USB Audio driver for AmigaOS4

I've been building a native USB Audio Class driver for AmigaOS 4 from scratch. It now supports stereo playback, 7.1 multichannel surround, recording with input switching, multi-device detection, and user-configurable device names. It's in beta

What works:

- Stereo and 7.1 multichannel playback
- Recording with Microphone, Line In, and SPDIF input switching
- Hardware volume control and input gain
- Multiple USB audio device detection and selection
- Glitch-free playback with triple-buffered isochronous transfers
- Clean start/stop without crashes
- Custom device names via prefs file
- Amiga Installer package for easy deployment

What to be aware of (beta caveats):

- Only USB Audio Class 1.0 devices are supported (covers most USB sound cards)
- Only 16-bit PCM format is currently handled
- The device must be connected before AHI initializes the driver
- Hot-plug/unplug while audio is playing will cause issues
- Not all USB audio devices have been tested — your mileage may vary
- Recording quality and input switching behavior depends on the specific USB chipsetIf you encounter problems, please capture the full serial debug log (all lines starting with [USBAudio]) and report the issue along with your device's VID:PID.

Read more here:

https://ko-fi.com/post/USBAudio-Bringi ... o-to-AmigaOS-4-B0B31VO9UN

And you can download it for free here: https://ko-fi.com/s/7f7d79b214

I'll add on os4 depot once it is stable enough

@afxgroup
I know who should be next president ! Thumbs up ! What else except C-Media CM106 (0D8C:0102) 7.1 USB may be worth of testing ? (something up2date which can be find in shops, etc)

@afxgroup
Nice!

@kas1e

This is working: https://www.amazon.it/dp/B002LM0U2S
And also this one: https://www.amazon.it/CSL-Ingresso-Mic ... nd-funzione/dp/B00NXV4NPQ

But should work also something like this:

https://www.amazon.it/Sabrent-Esterno- ... %A0-AU-MMSA/dp/B00IRVQ0F8
https://www.amazon.it/UGREEN-Esterna-A ... Compatibile/dp/B01N905VOY

@afxgroup
Exceptional work mate. I really enjoyed reading your post. Thank you for sharing it.

@afxgroup
Btw. regarding "the Sirion stack's tendency to report the same physical device multiple times at different USB addresses" you mention: Please tell me more.
I've never myself experienced anything like this, but if there's some underlying bug there which needs to be fixed in Sirion I'm all ears :)

Well done Andrea, congratulations on reaching the goal!

Excellent

That's amazing afxgroup. Many thanks for all your work!!!

@afxgroup
Great! Thank you very much!
It is not only driver - it also means one free slot in Sam460LE !

Great work. Many thanks indeed!

Great news! Thank you afxgroup. I'll check this driver with 2 DACs TOPPING EX5 and Topping D10.

Well done. Amazing. Does it depend on Update 3 and the new isochronous support?

Hi Andrea and all

As I reported in Discord channel I tried 4 different USB Sound Card

UGreen
Cheap 7.1 USB
Cheap 8.1 USB
Behringer U-Phobia UM-2

I can see USB Sound cards in Prefs/AHI or Prefs/Sound (A-Eon version), but I when I click Play A Test Sound, it locks the machine (Sam460)

Does anyone have the same problem ?

Excellent!!

As it happens, one of my three current projects is also USB audio.

So much to talk about.. I also have some working code for Audio2,
written for the Behringer 404HD.

There are quite a few challenges to making AHI work for USB. I hope you beat them all and I'll help if I can in any way.

There are a few things in Audio1 that were left undefined, so there's a few different ways of doing things. My latest code is for one specific device, on the thinking that if I get one "just right" then release the code it might grow from there. I was/am writing for the creative SoundBlaster Play3. Nothing particularly special about it except it's a name brand and should be available everywhere.

I suspect you're already past where I am right now. I look forward to downloading and testing tonight if I get a chance to do so.

///////////////////////edit/////////////////////////////
The Play3 is recognized, but when I play a test sound
everything stops..
Also it offers 7.1, which is not a supported mode in this adapter.

But I am very enthusiastic. It wouldn't hurt my feelings at all
if your driver is ready before mine is.

My "Amiga Time" is very limited, perhaps this weekend
I'll find a NULL modem cable and grab some debug for you.

//////////////////Another Edit ////////////////////////////
Based on Sashimi output, it all looks good until it tries to set
interface 1 to alternate 1. That is the correct choice, but immediately
after that everything stops.

That stop is from the libusb code..

I might be all wrong, but I don't have a null modem cable handy
tonight, it'll, have to wait for the weekend.

Good Luck! We're all rooting for you.