OBS Audio Bitrate: Streaming & Recording Settings

Introduction: Why Audio Bitrate Matters More Than You Think

Here is a fact that catches most new streamers off guard: viewers will tolerate a 720p video stream without complaint, but the moment your audio sounds muffled, tinny, or distorted, they leave. Audio quality is the single most underestimated factor in viewer retention, and the bitrate you set in OBS Studio is the number one lever you have to control it.

Poor audio bitrate settings are the most common mistake streamers and content creators make when configuring OBS. The default settings in OBS are functional, but they are rarely optimal. Whether you are streaming to Twitch, broadcasting on YouTube, recording a podcast, or capturing gameplay footage for later editing, getting your audio bitrate right can be the difference between content that feels professional and content that feels amateur.

In this guide, you will learn exactly what audio bitrate is, how to configure it in OBS Studio step by step, the recommended settings for every major use case, and how to troubleshoot the most common audio problems. By the end, you will have the knowledge to set up audio that sounds clean, clear, and broadcast-ready.

Audio Bitrate Basics: What Every Creator Needs to Know

What Is Audio Bitrate?

Audio bitrate is the amount of data used to represent one second of audio. It is measured in kilobits per second (kbps). A higher bitrate means more data is used per second of audio, which generally results in better sound quality but also a larger file size and more bandwidth consumption during a live stream.

Think of it like resolution for sound. Just as a 1080p video looks sharper than 480p because it contains more visual information, 320 kbps audio sounds fuller and more detailed than 64 kbps audio because it retains more of the original sound data.

How Bitrate Affects Audio Quality

The relationship between bitrate and perceived quality is not perfectly linear. Here is a rough breakdown:

Bitrate (kbps)	Perceived Quality	Typical Use
32-64	Poor, noticeable artifacts	Voice-only, very low bandwidth
96	Acceptable for speech	AM radio quality, basic voice chat
128	Good for most speech content	FM radio quality, standard podcasts
160	Very good, transparent for most listeners	Standard streaming audio
192	Excellent, difficult to distinguish from source	High-quality streaming
256	Near-transparent	High-fidelity recording
320	Maximum for lossy codecs, virtually indistinguishable from lossless	Archival, music production

Above 192 kbps, most listeners cannot tell the difference in a blind test, especially when the audio is speech rather than complex music. This is important to keep in mind because there is a real cost to setting your bitrate unnecessarily high during a live stream: it eats into the bandwidth available for your video.

Common Audio Codecs in OBS

OBS Studio supports several audio codecs, each with different characteristics:

• AAC (Advanced Audio Coding) --- The default and most widely used codec in OBS. AAC provides excellent quality at moderate bitrates and is universally supported by streaming platforms, browsers, and media players. For most creators, AAC is the right choice.

• MP3 (MPEG Audio Layer III) --- An older codec that is still widely compatible. MP3 is slightly less efficient than AAC at the same bitrate, meaning AAC will generally sound better at 128 kbps than MP3 at 128 kbps. OBS supports MP3 primarily for compatibility with older workflows.

• Opus --- A modern, open-source codec that is extremely efficient. Opus can deliver excellent audio quality at lower bitrates than either AAC or MP3. However, platform support for Opus in live streaming is still limited. It is an excellent choice for local recordings if your editing software supports it.

If you want to learn more about working with different audio formats after recording, check out our guide on how to extract audio from video, which covers converting between formats in detail.

CBR vs VBR: Constant and Variable Bitrate

OBS gives you two approaches to bitrate encoding:

• CBR (Constant Bitrate) --- The encoder uses the same bitrate throughout the entire stream or recording. This is predictable, which makes it the standard choice for live streaming. Streaming platforms like Twitch and YouTube expect a consistent data rate, and CBR delivers that.

• VBR (Variable Bitrate) --- The encoder adjusts the bitrate dynamically. Quiet moments use less data, and complex audio passages use more. This is more efficient for recordings because it allocates data where it is needed most, resulting in smaller files with equivalent quality. However, VBR can cause buffering issues during live streams because the fluctuating data rate may conflict with platform ingest expectations.

The rule of thumb: Use CBR for live streaming and VBR for local recordings.

How to Set Audio Bitrate in OBS Studio

Step 1: Open OBS Settings

Launch OBS Studio and click Settings in the lower-right corner of the main window, or navigate to File > Settings from the menu bar. This opens the Settings panel where all audio and video configurations live.

Step 2: Choose Your Output Mode (Simple vs Advanced)

In the Settings panel, click on the Output tab in the left sidebar. At the top of the Output settings, you will see Output Mode with a dropdown that offers two options:

• Simple --- Provides a streamlined interface with fewer options. This is suitable for beginners or creators who want to set it and forget it.
• Advanced --- Unlocks granular control including per-track audio bitrate settings, encoder selection, and separate configurations for streaming and recording. This is recommended for anyone who wants to optimize their setup.

Choose the mode that matches your experience level. We will cover both below.

Step 3: Set Audio Bitrate in Simple Mode

If you have selected Simple output mode:

1. In the Output tab, look for the Streaming section.
2. Find the Audio Bitrate dropdown.
3. Select your desired bitrate from the available options (64, 96, 128, 160, 192, 256, or 320 kbps).
4. For most streamers, 160 kbps is the sweet spot. It provides excellent audio quality without consuming excessive bandwidth.

In Simple mode, the same audio bitrate applies to both your streaming output and your recording. If you need different bitrates for streaming versus recording, you will need to switch to Advanced mode.

Step 4: Configure Audio Bitrate in Advanced Mode

Advanced mode is where OBS really shines for audio configuration. Here is how to set it up:

1. Set Output Mode to Advanced.
2. Click the Streaming tab within the Output settings.
3. Under Audio Encoder, select your preferred codec (typically AAC).
4. Under the Audio tab (next to Streaming, Recording, and Replay Buffer tabs at the top), you will see Track 1 through Track 6.
5. Each track has its own Audio Bitrate dropdown. Set the bitrate for each track you plan to use.

For streaming, OBS sends Track 1 by default. Set Track 1 to your desired streaming bitrate (160 kbps for Twitch, 192-320 kbps for YouTube).

For recording, you can assign different audio sources to different tracks and give each track its own bitrate. This is incredibly powerful for post-production workflows, which we cover in the multi-track section below.

Step 5: Verify Your Audio Sample Rate

Before you close the settings, navigate to the Audio tab in the left sidebar (not the Audio sub-tab under Output, but the main Audio settings tab). Here you will find the Sample Rate setting.

OBS offers two sample rate options:

• 44.1 kHz --- The standard for CD audio and many music applications.
• 48 kHz --- The standard for video production and broadcasting.

Always use 48 kHz for streaming and video recording. This is the standard sample rate for video content, and mismatches between your OBS sample rate and your audio interface or microphone sample rate can cause sync issues, crackling, or pitch problems.

Make sure the sample rate in OBS matches the sample rate configured in your operating system's sound settings and your audio interface (if you use one). Consistency across the entire audio chain prevents a whole category of problems.

Click Apply, then OK to save all your settings.

Recommended Audio Bitrate Settings by Scenario

Different use cases call for different bitrate configurations. Here are the recommended settings for the most common scenarios:

Scenario	Recommended Bitrate	Codec	Channels	Notes
Twitch Streaming	160 kbps	AAC	Stereo	Twitch transcodes audio; higher bitrates waste upload bandwidth with no quality gain for viewers
YouTube Streaming	192-320 kbps	AAC	Stereo	YouTube preserves higher bitrate audio; 256 kbps is an excellent middle ground
YouTube Recording/Upload	320 kbps	AAC	Stereo	Pre-recorded uploads benefit from maximum quality since bandwidth is not a constraint
Podcast Recording	192 kbps (mono) / 320 kbps (stereo)	AAC	Mono or Stereo	Speech content does not need extreme bitrates; 192 kbps mono sounds excellent for voice
Music Streaming	320 kbps	AAC	Stereo	Complex audio with wide frequency range benefits from maximum bitrate
Low Bandwidth	96-128 kbps	AAC	Stereo or Mono	When your upload speed is limited, 96 kbps still delivers acceptable speech quality
Local Recording (Archival)	320 kbps or PCM	AAC or PCM	Stereo	For recordings you plan to edit later, use the highest quality your storage allows
Discord/Voice Chat Capture	128 kbps	AAC	Mono	Voice chat audio is already compressed; high bitrates add file size without improving quality

Key Takeaways from the Table

For Twitch streamers: Do not set your audio bitrate above 160 kbps. Twitch re-encodes all audio during transcoding, and the platform caps audio quality regardless of what you send. Setting it to 320 kbps only wastes upload bandwidth that would be better spent on video quality.

For YouTube streamers: You have more headroom. YouTube preserves higher quality audio, so 256 kbps is a worthwhile upgrade over 160 kbps, especially if you have sufficient upload bandwidth.

For recording: Always go higher. When you are recording locally, bandwidth is not a factor. Storage is cheap, and starting with the highest quality source material gives you the most flexibility in post-production. If you later need to add music to your video during editing, having a high-quality original audio track ensures the best possible final result.

Multi-Track Audio Configuration in OBS

One of the most powerful features in OBS Studio is multi-track audio recording. This allows you to record different audio sources on separate tracks, each with its own bitrate, so you can mix them independently in post-production.

Why Use Multi-Track Audio?

Imagine this common scenario: you are recording a gaming video with commentary. Your audio sources include:

• Your microphone (voice commentary)
• Game audio (in-game sounds and music)
• Discord (friends on voice chat)
• Music player (background music or alerts)

If all of these are mixed into a single audio track, you cannot adjust the volume of any individual source after the fact. If your friend screams into their microphone during a key moment, that moment is ruined and there is nothing you can do in editing.

With multi-track audio, each source lives on its own track. In your video editor, you can independently control the volume, apply noise reduction, or even completely remove audio from a specific track without affecting the others.

How to Set Up Multi-Track Audio

1. Open Settings > Output and set Output Mode to Advanced.
2. Click the Recording tab.
3. Under Audio Track, check the boxes for the tracks you want to include in your recording (Tracks 1 through 6).
4. Click the Audio tab (next to Streaming/Recording tabs) to set the bitrate for each track individually.
5. Back in the main OBS window, open the Advanced Audio Properties by clicking the gear icon in the Audio Mixer section or navigating to Edit > Advanced Audio Properties.
6. In the Advanced Audio Properties window, you will see a grid showing each audio source and checkboxes for Tracks 1 through 6.
7. Assign each audio source to its designated track.

Recommended Multi-Track Layout

Track	Source	Bitrate	Rationale
Track 1	Combined mix (all sources)	160-192 kbps	This is the default track for streaming and serves as a "safety" mix for recording
Track 2	Microphone only	192 kbps	Isolating your voice allows for independent noise reduction and level adjustment
Track 3	Game/Desktop audio	192 kbps	Separate game audio for precise volume control in editing
Track 4	Discord/Voice chat	128 kbps	Voice chat is already compressed; 128 kbps is sufficient
Track 5	Music/Alerts	192 kbps	Keeping music separate lets you adjust or remove it to avoid copyright issues
Track 6	Reserved/Backup	128 kbps	Use as needed for additional sources

This layout gives you maximum flexibility in post-production. Track 1 serves double duty: it goes out to your live stream and also acts as a pre-mixed backup in your recording in case you do not want to deal with multi-track editing.

Bitrate Considerations for Multi-Track

When using multiple audio tracks, keep in mind that each track adds to your total file size. Six tracks at 192 kbps each means 1,152 kbps (about 1.15 Mbps) dedicated to audio alone. For local recordings this is negligible, but be mindful of storage if you are recording long sessions.

For streaming, only Track 1 is sent to the platform. The additional tracks are only included in your local recording file. This means your streaming bandwidth is unaffected by multi-track configuration.

Troubleshooting Common Audio Issues

Even with the right bitrate settings, audio problems can crop up. Here are the most common issues and their solutions.

Audio Sounds Muffled or Compressed

Symptom: Your audio sounds like it is coming through a pillow. Consonants are soft, sibilance is gone, and the overall sound lacks clarity and presence.

Cause: Your audio bitrate is set too low. At bitrates below 96 kbps, the encoder aggressively discards high-frequency audio data to fit within the bitrate constraint. The result is audio that sounds muffled and lifeless.

Fix:

• Increase your audio bitrate to at least 160 kbps for streaming or 320 kbps for recording.
• Check that you are using AAC rather than MP3, as AAC preserves more quality at the same bitrate.
• Verify that your microphone input is not being double-compressed (for example, by a VST plugin applying lossy compression before OBS encodes it).

Audio and Video Out of Sync

Symptom: Your voice does not match your lip movements, or game sounds are delayed relative to the on-screen action. The desync may be subtle (50-100ms) or severe (several seconds).

Cause: This is almost always caused by a sample rate mismatch somewhere in your audio chain, or by encoder latency differences between audio and video.

Fix:

• Ensure your OBS sample rate (Settings > Audio) is set to 48 kHz.
• Verify that your operating system audio output is also set to 48 kHz. On Windows, right-click the speaker icon > Sound settings > Device properties > Additional device properties > Advanced tab. On macOS, open Audio MIDI Setup and check your output device sample rate.
• If you use an external audio interface, confirm it is set to 48 kHz in its control panel.
• In OBS, use the Advanced Audio Properties (Edit > Advanced Audio Properties) to apply a Sync Offset to the specific source that is out of sync. Start with small values (50-100ms) and adjust until the sync is correct.
• If the desync gets progressively worse over time (starts in sync but drifts), this almost certainly indicates a sample rate mismatch rather than a fixed offset.

Audio Crackling or Popping

Symptom: Your audio has intermittent clicks, pops, or crackling sounds that are not present in the source.

Cause: This can be caused by buffer size conflicts, CPU overload, sample rate mismatches, or USB bandwidth issues with audio interfaces.

Fix:

• Increase your audio buffer size. If you use an audio interface, increase the buffer size in its control panel (try 256 or 512 samples).
• Close unnecessary applications that may be consuming CPU cycles. OBS encoding is resource-intensive, and audio processing is the first thing to suffer when the CPU is overloaded.
• Check for sample rate mismatches (see the sync section above). Even a mismatch between 44.1 kHz and 48 kHz can cause periodic clicking.
• If you use a USB microphone or interface, try connecting it directly to your computer rather than through a USB hub.
• On Windows, consider switching your audio backend. In OBS Settings > Audio, try changing between Windows Audio Session API (WASAPI) and other available options.

No Audio in Recording

Symptom: You finish a recording session, open the file, and there is no audio at all, or audio is present on the stream but missing from the recording.

Cause: This is a track routing misconfiguration. The audio sources are assigned to tracks that are not included in your recording output.

Fix:

• Open Settings > Output > Recording and verify which audio tracks are checked for inclusion in the recording.
• Open Edit > Advanced Audio Properties and verify that your audio sources have checkmarks on the tracks that are included in your recording.
• A common mistake: in Advanced mode, Track 1 is used for streaming and you have set up Tracks 2-4 for recording, but you forgot to check those tracks in the Recording output settings.
• Test with a short 10-second recording before committing to a long session.

File Size Too Large

Symptom: Your recording files are enormous, consuming storage far faster than expected.

Cause: Your audio bitrate may be unnecessarily high, you may have too many audio tracks at high bitrates, or you may be using an uncompressed audio format.

Fix:

• If you are recording with PCM (uncompressed) audio, switch to AAC at 320 kbps. The quality difference is negligible for most content, but the file size difference is dramatic. PCM stereo at 48 kHz consumes approximately 1,536 kbps, while AAC at 320 kbps is roughly five times smaller.
• Reduce the number of audio tracks if you do not need all six.
• For tracks that carry only voice (no music), consider reducing the bitrate to 128-160 kbps.
• Remember that video bitrate is typically the much larger contributor to file size. If your files are truly excessive, check your video bitrate settings first.

If you find yourself needing to reduce the size of already-recorded files, our guide on removing audio from video can help when you need to strip unnecessary audio tracks from existing recordings.

OBS Audio Bitrate vs Video Bitrate: Finding the Balance

When you are streaming live, your total upload bandwidth is finite. Every kilobit per second you allocate to audio is one less kilobit available for video. Understanding how to balance the two is critical for delivering the best overall viewing experience.

The Bandwidth Budget

Your total available bitrate for streaming depends on your upload speed and the platform's limits. Here is how the major platforms cap total bitrate:

Platform	Maximum Total Bitrate	Recommended Total Bitrate
Twitch	6,000 kbps	4,500-6,000 kbps
YouTube	51,000 kbps (4K) / 9,000 kbps (1080p)	4,500-9,000 kbps
Facebook Live	4,000 kbps	3,000-4,000 kbps
Kick	8,000 kbps	4,500-8,000 kbps

The Audio Allocation Rule

A good rule of thumb is that audio should consume 5-10% of your total streaming bitrate. Here is how that works in practice:

Total Bitrate	Audio Allocation (5-10%)	Recommended Audio Bitrate	Remaining for Video
3,000 kbps	150-300 kbps	160 kbps	2,840 kbps
4,500 kbps	225-450 kbps	160 kbps	4,340 kbps
6,000 kbps	300-600 kbps	160-192 kbps	5,808-5,840 kbps
8,000 kbps	400-800 kbps	192-256 kbps	7,744-7,808 kbps

Notice that even at the high end, 160 kbps audio is well within the 5-10% range for most streaming bitrates. This is why the common recommendation of 160 kbps for Twitch works so well: it delivers excellent audio quality while leaving the vast majority of your bandwidth for video, where viewers notice quality differences much more acutely.

When to Prioritize Audio Over Video

There are specific scenarios where you should allocate a higher percentage of your bandwidth to audio:

• Music performance streams --- If you are a musician streaming a live performance, audio quality is your primary product. Consider 256-320 kbps audio even if it means dropping your video from 1080p to 720p.
• Podcast-style streams --- If your stream is primarily talking heads with minimal visual complexity, the video encoder does not need as much bitrate. Allocate more to audio.
• ASMR content --- Audio fidelity is the entire point. Use the highest audio bitrate your bandwidth allows.

For most gaming, Just Chatting, and general content streams, 160 kbps audio is the correct choice. Spend the rest on video.

The Impact of Audio Bitrate on Upload Stability

One often overlooked consideration is stream stability. Setting your combined audio and video bitrate too close to your maximum upload speed is a recipe for dropped frames and buffering. Always leave a margin of at least 20-30% between your total stream bitrate and your available upload speed.

For example, if your upload speed is 10 Mbps (10,000 kbps), do not set your total bitrate above 7,000-8,000 kbps. This accounts for network fluctuations and ensures a stable stream even when other devices on your network are consuming bandwidth.

Advanced Audio Settings Worth Knowing

Beyond bitrate, there are several other audio settings in OBS that affect quality and are worth understanding.

Audio Encoder Selection

In Advanced output mode, you can choose your audio encoder. The options vary by platform:

• FFmpeg AAC --- The default encoder. Good quality, universally compatible.
• CoreAudio AAC (macOS only) --- Apple's AAC encoder, generally considered slightly higher quality than FFmpeg AAC at the same bitrate.
• libfdk_aac --- Widely regarded as the best AAC encoder, but not included in default OBS builds due to licensing. Available in some custom builds.

For most users, the default FFmpeg AAC encoder is perfectly adequate. The quality differences between encoders are minimal at bitrates of 160 kbps and above.

Downmixing and Channel Configuration

OBS defaults to stereo output (2 channels), which is correct for virtually all streaming and recording scenarios. If you specifically need mono output (for example, a single-voice podcast), you can configure this in the Advanced Audio Properties for individual sources rather than changing the global setting.

Some streamers wonder about 5.1 surround sound. While OBS can technically handle multichannel audio, streaming platforms do not support surround sound. Stick with stereo for streaming. For local recordings, surround sound only makes sense if your entire editing and delivery pipeline supports it.

Audio Filters and Their Impact on Bitrate Efficiency

OBS audio filters (noise suppression, noise gate, compressor, limiter) do not directly change the bitrate, but they can make a given bitrate more effective. Here is why:

• Noise suppression removes background noise that would otherwise consume bitrate to encode. With less noise, the encoder can dedicate more of its bitrate budget to preserving the actual audio you care about.
• Compression (dynamic range compression, not data compression) reduces the difference between loud and quiet parts of your audio. This results in more consistent audio levels, which lossy encoders handle more efficiently.
• Noise gate silences your microphone when you are not speaking. During silent periods, the encoder can use minimal data, effectively saving bitrate for when you are actually talking.

Applying appropriate audio filters before encoding is like giving your encoder a head start. The audio arriving at the encoder is cleaner and more consistent, which means the encoder can produce better results at any given bitrate.

Frequently Asked Questions

What is the best audio bitrate for Twitch streaming?

The best audio bitrate for Twitch streaming is 160 kbps using the AAC codec. Twitch re-encodes all incoming audio during the transcoding process, so sending audio at bitrates higher than 160 kbps does not improve what viewers actually hear. It only consumes upload bandwidth that would be better allocated to video quality. If you are on a very limited connection, 128 kbps is the lowest you should go while still maintaining acceptable quality for speech and game audio.

Does higher audio bitrate mean better sound quality?

Higher audio bitrate generally means better sound quality, but only up to a point. For AAC encoding, most listeners cannot distinguish between 192 kbps and 320 kbps in a blind test, especially for speech-based content. The improvement from 96 kbps to 160 kbps is very noticeable, the improvement from 160 kbps to 256 kbps is subtle, and the improvement from 256 kbps to 320 kbps is virtually imperceptible to most ears. Your microphone quality, room acoustics, and audio processing chain have a far greater impact on perceived quality than increasing bitrate beyond 192 kbps.

Should I use 44.1 kHz or 48 kHz sample rate in OBS?

Use 48 kHz. This is the standard sample rate for video production and is what all major streaming platforms expect. Using 44.1 kHz forces OBS or the platform to resample the audio, which can introduce artifacts and sync issues. Make sure your operating system, audio interface, and OBS are all set to 48 kHz for a consistent audio chain.

Can I set different audio bitrates for streaming and recording?

Yes, but only in Advanced output mode. In Simple mode, a single audio bitrate applies to everything. In Advanced mode, streaming and recording use separate encoder configurations. You can set a conservative bitrate (160 kbps) for your live stream while recording at maximum quality (320 kbps) simultaneously. This is one of the strongest reasons to use Advanced output mode.

What audio bitrate should I use for YouTube uploads?

For pre-recorded video uploads to YouTube (not live streaming), use 320 kbps AAC. Since you are uploading a file rather than streaming in real time, bandwidth is not a constraint. YouTube will re-encode your audio, and starting with the highest quality source material ensures the best possible result after YouTube's processing. For YouTube live streaming, 192-256 kbps is the sweet spot because YouTube preserves higher quality audio than Twitch does.

Does audio bitrate affect my stream's frame rate or dropped frames?

Audio bitrate can indirectly affect stream stability if your total bitrate (audio plus video) exceeds what your upload connection can handle. However, audio bitrate is a tiny fraction of total bitrate. Going from 128 kbps to 320 kbps audio only adds 192 kbps to your total, which is negligible compared to the 3,000-8,000 kbps typically used for video. If you are experiencing dropped frames, the cause is almost always video bitrate exceeding your upload capacity, not audio bitrate. Check your video encoding settings first.

Conclusion

Audio bitrate is one of those settings that seems minor but has an outsized impact on the quality of your content. The wrong setting can make even an expensive microphone sound like a phone call from 2005, while the right setting ensures your audience hears you clearly and stays engaged.

Here is the quick summary:

• Twitch streaming: 160 kbps AAC, CBR, 48 kHz sample rate.
• YouTube streaming: 192-256 kbps AAC, CBR, 48 kHz.
• Local recording: 320 kbps AAC (or PCM for maximum quality), 48 kHz.
• Always use 48 kHz sample rate across your entire audio chain.
• Use Advanced output mode for per-track bitrate control and the best flexibility.
• Keep audio at 5-10% of total bitrate when budgeting your streaming bandwidth.

Take five minutes to audit your OBS audio settings today. Open Settings, check your output bitrate, verify your sample rate, and run a quick test recording. Listen back with headphones. If the audio sounds clean, clear, and natural, you are good to go. If not, use the troubleshooting section above to diagnose and fix the issue.

Great audio does not require expensive equipment. It requires the right settings, and now you have them.