What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Microsoft’s real-time transcription endpoint is specifically named MAI-Transcribe-2-Streaming. Microsoft Learn labels it public preview, says it has no SLA, and does not recommend it for production workloads. The instructions below describe Microsoft’s documented Realtime API path; check the current guidance before deploying because preview details and regional availability can change.
What you need before streaming
Microsoft’s documented prerequisites are an Azure subscription, a Microsoft Foundry resource in a supported region, and a deployment of MAI-Transcribe-2-Streaming. Confirm the region for the integration you plan to use: Microsoft’s Realtime API and Speech SDK guides currently show slightly different region lists.
- A live audio source, such as a microphone, or audio supplied by your application.
- A Microsoft Entra bearer token or an API key for the resource.
- A client capable of opening a WebSocket connection and sending JSON messages.
A USB microphone is optional; any suitable audio source can feed the application. Microsoft’s guide does not endorse a particular hardware model.
How to stream speech transcription with the Realtime API
The Realtime API uses a WebSocket endpoint under your resource. Microsoft’s guide also shows the transcription intent in the request URI:
#1 Best Overall
- Omnidirectional Microphone - It is not a Speaker or Speakerphone, it is a condenser microphone. The microphone has an omnidirectional pickup pattern with a pickup distance of 11.5 ft, making it easy to capture the most subtle sounds from 360° directions and transmit the sound more loud and clear. Participants can hear each other without raising their voices.
- Made for Conferences - This microphone is perfect for small or medium meetings over an internet network by using Skype/GoToMeeting/WebEx/Hangouts/Fuze/VoIP/Zoom and other softwares. You can also use it for court reports, seminars, remote training, business negotiations, video chats, etc.
- Plug & Play, No Drivers Required - The microphone is compatible with all operating systems - both Windows and macOS. You just need to plug the microphone to start recording. If there is no response after inserting the mic, please go to the microphone setting of your computer and select the mic as the INPUT device.
- Convenient Mute Button - Quickly mute/unmute your microphone. The built-in blue indicator light for checking whether the USB microphone is working.
- Well Designed Cable - The microphone is constructed of sturdy and metal material and the base is fitted with an anti-slip mat which keeps it stable on desktop during use. It is small, convenient and does not require much space when in use. Connected with a 1.8m nylon shielded wire, it effectively eliminates signal interferences to achieve the best recording results.
wss://{your_resource_name}.services.ai.azure.com/mai/v1/realtime?intent=transcription
Authenticate with a Microsoft Entra bearer token or an api-key. The guide documents the API key in a connection header, and also describes a query-string key option. Treat the key as a secret and use the authentication method supported by your client and deployment.
Rank #2
- 【Crystal Clear Audio Quality】Our Omnidirectional pattern condenser microphone accurately captures your voice, making it perfect for dictation, online classrooms, and more.
- 【Active Noise-Cancelling】Come in CMTECK CCS2.0 SMART CHIP with Omnidirectional Polar Pattern, which can effectively block the background noise. The pop filter prevents plosives from overloading the microphone, ensuring only your voice is heard.7
- 【Convenient Mute Button with LED Indicator】You can quickly mute/un-mute the microphone with the Mute Button and the built-in LED light lets you know the working status(Greenlight: Connected; Red light: Mute mode).
- 【Easy to use】 No drivers needed, just plug and record without external power supply, directly connect the microphone to a USB compatible device, well compatible with Windows(7, 8 and 10), Mac OS and PS4 (NOT compatible with Raspberry Pi/Linux/Android）
- 【Mini size with Adjustable Gooseneck】Adopted flexible and adjustable gooseneck metal pipe, easily adjust position 360 degrees to suit user comfort. The compact and stable base maximizes your desktop space.
- Open the WebSocket. Connect to the endpoint using the resource name and authenticate the request.
- Configure the session before sending audio. Send a
session.updatemessage selecting a transcription session and your deployed model name,MAI-Transcribe-2-Streaming. Configure the input format as raw mono signed little-endian PCM16 at either 16,000 or 24,000 samples per second. You may leave the language unset for automatic detection or provide a language code; unrecognized values are treated as unset. - Append audio as it is captured. Send nonempty PCM16 audio bytes, base64-encoded, in
input_audio_buffer.appendmessages. Send the raw PCM bytes only—do not include a WAV header. - Consume transcription events. Keep separate accumulated finalized text and a replaceable provisional suffix, as described below.
- Commit at a pause or when capture ends. Send
input_audio_buffer.committo commit the buffered audio. Use the resultingcompletedevent as the final transcript for audio since the previous commit.
How to handle partial and final transcript events
The key to a stable live display is treating the event types differently. A delta carries newly finalized text: append it to the accumulated transcript exactly as delivered. An intermediate event carries a provisional suffix: replace the previous provisional suffix with the latest one, rather than appending it.
Conceptually, render the transcript as:
accumulated delta text + latest intermediate suffix
Rank #3
- 360 Degree Position Adjustable Gooseneck Design --Plug and play USB microphone Pick up the sound from 360-degree with high sensitivity, in the best possible location for sound to your PC gaming, dragon voice dictation, and talk to Cortana
- Mute Button & LED Indicator --One-click to mute/unmute your microphone for pc, Build-in LED indicator tells you the working status at any time
- Intelligent Noise-Canceling Tech --Premium omnidirectional condenser microphone with noise-canceling technology can pick up your clear voice and reduce background noise and echo
- USB Plug&Play(1.8/6ft USB Cable) -- No driver required. Just need to plug & play for the microphone to start recording, well compatible with Windows(7, 8, 10 and 11) and macOS. (NOT compatible with Xbox/Raspberry Pi/Android)
- Solid Construction--Adopting premium metal pipe and heavy-duty ABS stand to make sure that you will be satisfied with our computer mic quality
When a later delta finalizes text that was provisional, add the delta to the finalized portion and update or clear the provisional suffix according to the incoming events. Do not insert or strip spaces around deltas; Microsoft cautions that the text should be appended exactly as delivered. At commit, the completed event contains the full final transcript since the prior commit, which you can use to replace the displayed hypothesis for that committed audio.
Do not expect one response per audio append. Microsoft notes that an append may produce no transcript event or multiple events, and the API does not provide a one-to-one acknowledgement for every append. Build the interface around transcript events, not presumed append acknowledgements.
Rank #4
- Clear Sound and Noise Reduction: Update Computer Conference Microphone is equipped with high-density sound-absorbing cotton, which provides high-fidelity crystal sound and clear pickup. The built-in smart chip can effectively block background noise, eliminate echoes, and make the sound clearer and smoother, such as face-to-face conversations
- 360° Omnidirectional Microphone, Small but Powerful: This USB omnidirectional microphone can easily capture 360 degree omnidirectional weak signals, reproduce your voice vividly, ideal for 4-6 people on conference calls. (with 1.8 m / 6 ft USB cable) Please be aware that this conference microphone can only be used as a microphone, it has no speaker function
- USB Free Driver, Easy to Use: True plug and play, no need to download anything. Connect one end to the computer (laptop or desktop) and the other end (Type-C) to the microphone. This USB microphone with mute button, press the mute button to quickly mute/unmute, perfect for online group meetings and distance education
- Wide Use and Compatibility: This USB conference microphone has multi-purpose uses, such as online meeting/teaching, and business/home video calling, ideal for small group meetings and virtual learning. This laptop microphone works with Mac OS X Windows 7/8/10 systems. Please be aware that it is not compatible with Raspberry Pi/Linux/Android/Xbox
- Portable Design: You can easily carry this handy microphone in your pocket or business bag and take it anywhere. Note: This model not with speaker
Audio format and chunking
- Encoding: signed little-endian PCM16, mono.
- Sample rate: 16 kHz or 24 kHz.
- Message payload: base64 audio bytes in
input_audio_buffer.append. - Header: no WAV header; provide raw PCM bytes.
Microsoft recommends small chunks, such as 10–20 ms, to minimize latency. Larger chunks reduce network overhead but can increase the delay before the service receives the audio. Your capture pipeline must therefore convert or configure its output to the documented PCM format before encoding it for transmission.
Session behavior, language, and regions
A Realtime API session can last up to one hour. Set session options before the first audio append: Microsoft says settings cannot be changed after audio has started. In this interface, turn_detection and noise_reduction are documented as supporting only null.
Best Value
- [Convenient Setup] Plug and play recording USB microphone for PC, with 5.9-Foot USB cable included for computer PC laptop, is connected directly to USB-A port for recording music, computer singing or podcast. The office condenser microphone for computer is easy to use and install. (NOT compatible with Xbox and Phones)
- [Durable Metal Design] Solid sturdy metal construction design, the computer microphone for Zoom meetings with stable tripod stand is convenient when you are doing voice overs or livestreams on YouTube. Durable material extends the service life of the voice-over microphone.
- [Mic Volume Knob] Gaming condenser USB mic compatible for PS4 with additional volume knob itself has a louder or quieter adjustment and is more sensitive. Your voice would be heard well enough through the zoom microphone USB when gaming, skyping or voice recording. Also, you can adjust your volume to zero and protect your privacy.
- [Widely Use] USB-powered design, the condenser microphone for recording no need the 48v Phantom power supply, works well with Cortana, Discord, voice chat and voice recognition. The podcast microphone for Mac, with USB-B to USB-A/C cable, is compatible with desktop, laptop or PS4/PS5, which meets most of your daily recording needs.
- [Clear Output Voice] Cardioid condenser microphone for PC captures your voice properly, producing clear smooth and crisp sound. Great computer recording mic for gamers/streamers/youtubers focus on the main source and reduces background noise. The streaming microphone does the job well for broadcast ,OBS and teamspeak.
Microsoft states that the streaming model supports 60 languages. The API can detect language automatically when the language field is unset, or accept an explicit language hint. The current Realtime API guide lists Sweden Central, Central US, and South India as available, with East US 2 marked coming soon. The Speech SDK guide instead lists Southeast Asia in place of South India, so verify the region list on the exact integration page and confirm availability for your resource before creating a deployment.
Realtime API or Azure Speech SDK?
Microsoft documents two integration routes. Choose based on how much transport behavior you want to own and what your application already uses.
| Integration | What Microsoft documents | Best fit |
|---|---|---|
| Realtime API | WebSocket interface; your application sends audio and handles connection behavior and transcript events. | Applications with an existing Realtime-compatible WebSocket client or a need for direct protocol control. |
| Azure Speech SDK | Managed-client route; Microsoft positions it for connection management, retries, and audio streaming handled by the client library. The guide lists Azure Speech SDK v1.52.0 as a prerequisite in its current documentation. | Applications that prefer SDK-managed streaming and connection behavior. Check the current SDK version and setup instructions in Microsoft’s guide. |
Both routes support intermediate and final transcription results. Region availability can differ between their guides, so select the integration and validate its supported region before building around it.
Recommended Free Tools
Preview status and production considerations
Microsoft Learn describes MAI-Transcribe-2-Streaming as public preview, without an SLA, and not recommended for production workloads. That caveat matters for applications where transcription availability or service commitments are critical. Microsoft’s October 1, 2026 corporate announcement makes a ranking claim in its title, but it is not a substitute for independently assessed benchmark methodology and does not change the preview status.
Quick Recap
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.
