For a standard stereo radio stream sent to YouTube over RTMP or RTMPS, choose AAC and set audio to 44.1 kHz at 128 Kbps. YouTube also lists MP3 as supported, but its live encoder guidance gives the stereo recommendation above. First check which ingestion protocol your encoder uses: YouTube’s HLS guidance lists a different set of supported codecs.
Check your YouTube ingestion protocol first
The audio codec choice depends on how your encoder sends the live stream to YouTube. RTMP/RTMPS and HLS have separate requirements; do not treat one protocol’s codec list as applying to the other.
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| Ingestion route | Codecs YouTube lists | Stereo guidance | 5.1 guidance | Practical consideration |
|---|---|---|---|---|
| RTMP/RTMPS | AAC or MP3 | 44.1 kHz, 128 Kbps | Only AAC is supported for 5.1; 48 kHz, 384 Kbps | YouTube recommends RTMPS for encrypted transport. |
| HLS | AAC, AC3, or EAC3 | 44.1 kHz, 128 Kbps | 48 kHz, 384 Kbps | HLS sends segments and has higher latency than RTMP. Choose it when your workflow calls for HLS, not just to gain another codec option. |
These are YouTube’s documented live-stream settings, not universal audio-engineering rules. See YouTube Help’s live encoder settings, bitrates, and resolutions and its guide to setting up an HLS stream.
AAC or MP3 for YouTube Live stereo audio?
For conventional stereo over RTMP or RTMPS, AAC is the straightforward default: it is supported and matches YouTube’s listed stereo configuration of 44.1 kHz and 128 Kbps. MP3 is also listed as supported for this route. If your encoder already uses MP3 and the stream is working, the published guidance does not establish a reason to switch on sound-quality grounds alone.
#1 Best Overall
- Pro performance with great pre-amps - Achieve a brighter recording thanks to the high performing mic pre-amps of the Scarlett 3rd Gen. A switchable Air mode will add extra clarity to your acoustic instruments when recording with your Solo 3rd Gen
- Get the perfect guitar and vocal take with - With two high-headroom instrument inputs to plug in your guitar or bass so that they shine through. Capture your voice and instruments without any unwanted clipping or distortion thanks to our Gain Halos
- Studio quality recording for your music & podcasts - Achieve pro sounding recordings with Scarlett 3rd Gen’s high-performance converters enabling you to record and mix at up to 24-bit/192kHz. Your recordings will retain all of their sonic qualities
- Low-noise for crystal clear listening - 2 low-noise balanced outputs provide clean audio playback with 3rd Gen. Hear all the nuances of your tracks or music from Spotify, Apple & Amazon Music. Plug-in headphones for private listening in high-fidelity
- Everything in the box: Includes Pro Tools Intro+, Ableton Live Lite, Cubase LE, and Hitmaker Expansion: a suite of essential effects, powerful software instruments, and easy-to-use mastering tools
YouTube’s live encoder guidance does not compare these codecs in controlled listening tests or identify a codec-specific reliability advantage for continuous radio. Perceived sound depends on factors such as the source audio, bitrate, encoder implementation, and listening conditions. The supported setting is a compatibility recommendation, not proof that one codec always sounds best.
Set the sample rate and bitrate for the format you send
Stereo
For YouTube live stereo audio, use 44.1 kHz at 128 Kbps, following the guidance for the ingestion route you selected. These figures describe audio encoding settings; they do not mean every viewer receives the original input unchanged.
Rank #2
- The new generation of the songwriter's interface: Plug in your mic and guitar and let Scarlett Solo 4th Gen bring big studio sound to wherever you make music
- Studio-quality sound: With a huge 120dB dynamic range, the newest generation of Scarlett uses the same converters as Focusrite’s flagship interfaces, found in the world's biggest studios
- Find your signature sound: Scarlett 4th Gen's improved Air mode lifts vocals and guitars to the front of the mix, adding musical presence and rich harmonic drive to your recordings
- All you need to record, mix and master your music: Includes industry-leading recording software and a full collection of record-making plugins
- Everything in the box: Includes Pro Tools Intro+, Ableton Live Lite, Cubase LE, and Hitmaker Expansion: a suite of essential effects, powerful software instruments, and easy-to-use mastering tools
5.1 surround
Do not apply the surround settings to a stereo radio stream. For RTMP/RTMPS, YouTube says 5.1 is supported only with AAC and recommends 48 kHz at 384 Kbps. Its HLS guidance also lists 48 kHz and 384 Kbps for 5.1. Confirm that your encoder is actually sending a 5.1 signal before selecting surround settings.
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Keep encoding mode in its own category
YouTube also recommends constant bitrate (CBR) for RTMP/RTMPS stream encoding. CBR is an encoding-mode setting, not an audio codec, so selecting AAC or MP3 does not by itself configure CBR.
Rank #3
- PLUG IN AND HEAR SOUND IN SECONDS - USB Type-A connector with a 3.5mm stereo headphone output and a separate 3.5mm mono microphone input. No drivers, no software, no external power - the adapter is USB bus-powered and is recognized as a standard USB audio device.
- WORKS ON WINDOWS, MAC AND LINUX - Driverless on Windows 98SE/ME/2000/XP/Server 2003/Vista/7/8, Linux and Mac OSX, and compliant with the USB Audio Device Class 1.0 specification, so any system that supports class-compliant USB audio will see it. Select it as the sound output and input device after plugging it in.
- TWO JACKS, TWO JOBS - The green jack is stereo OUT for headphones or powered speakers; the pink jack is mono microphone IN for a 3.5mm mic. It does NOT support 4-pole headsets on a single combo plug, it does NOT power passive speakers, and it does NOT add surround sound - it is a stereo 2-channel adapter.
- FOR LAPTOPS AND DESKTOPS THAT NEED AN AUDIO PORT BACK - Adds a headphone and mic port to a laptop, desktop, or mini PC whose onboard jack has failed or was never there. Managed and work-issued computers can block new USB audio devices by policy - check with your IT department before ordering for a company machine.
- SABRENT SUPPORT AND WARRANTY - What is in the box: one USB audio sound adapter. Backed by a 1-year limited warranty, extended to 2 years when you register within 90 days on the manufacturer's website.
Understand what viewers receive
The codec configured in your encoder is for the YouTube ingestion path; it does not guarantee that every listener’s device receives that exact format. YouTube says it automatically transcodes live streams into multiple output formats so viewers on different devices and networks can watch. In YouTube Help’s words: “YouTube will automatically transcode your live stream to create many different output formats so that all of your viewers across many devices and networks can watch.”
Test and monitor a continuous radio stream
- Match the test to the real stream. Before going live, send a test with audio and movement similar to the planned broadcast, using the same protocol, codec, sample rate, and bitrate.
- Check YouTube’s stream health. Review the live control room’s stream-health information and messages during the test and the broadcast. Address warnings or audio problems rather than assuming a successful connection means the sound is correct.
- Watch for sustained stability. For a 24/7 station, keep monitoring the ongoing stream for interruptions or degraded audio. YouTube recommends testing and monitoring but does not specify a universal test duration.
Or let it run in the cloud
If the goal is to keep prerecorded radio content live around the clock, StreamNeo lets you upload a recording or build a playlist, add your YouTube stream key once, and go live. It loops the uploaded video from the cloud, so nothing has to stay on at home. Your upload streams as made, up to 4K 60fps, at one price per slot; YouTube ingestion and codec settings still need to match your intended stream. StreamNeo automatically recovers if YouTube drops the stream. The first day is free with no card, and the service is for YouTube streams, not camera broadcasts. Monthly pricing is $9.99 per month. Learn more at StreamNeo, or start the free day.
Quick Recap
Best Value
- The new generation of the artist's interface: Connect your mic to Scarlett's 4th Gen mic pres. Plug in your guitar. Fire up the included software. Start making your first big hit
- Studio-quality sound: With a huge 120dB dynamic range, the newest generation of Scarlett uses the same converters as Focusrite’s flagship interfaces, found in the world's biggest studios
- Never lose a great take: Scarlett 4th Gen's Auto Gain sets the perfect level for your mic or guitar, and Clip Safe prevents clipping, so you can focus on the music
- Find your signature sound: Air mode lifts vocals and guitars to the front of the mix, adding musical presence and rich harmonic drive to your recordings
- With Scarlett 4th Gen, you have all you need to record, mix and master your music: Includes industry-leading recording software and a full collection of record-making plugins
Rank #4
- Podcast, Record, Live Stream, This Portable Audio Interface Covers it All - USB sound card for Mac or PC delivers 48kHz audio resolution for pristine recording every time
- Be ready for anything with this versatile M-AUDIO interface - Record guitar, vocals or line input signals with two combo XLR / Line / Instrument Inputs with phantom power
- Everything you Demand from an Audio Interface for Fuss-Free Monitoring - 1/4" headphone output and stereo 1/4" outputs for total monitoring flexibility; USB/Direct switch for zero latency monitoring
- Get the best out of your Microphones - M-Track Duo’s transparent Crystal Preamps guarantee optimal sound from all your microphones including condenser mics
- The MPC Production Experience - Includes MPC Beats Software complete with the essential production tools from Akai Professional
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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