Create Aggregate device?

[iamjonny]

Hi, great work! Just read your readme to understand what this is vs ASIO4ALL.

I installed to create an aggregate device, like the OOBE on Mac (perhaps since v1!) to be able to target headphones or speakers

It's been so long since I messed with a DAW I can't even remember if this was a feature of ASIO4ALL
Now on win11 and using sonicpi (>> sonic-collider) and it looks like both outputs devices are accessible at same time,
only because of an issue where

• audio-server doesn't update after hardware change, so
• headphone plug in requires restart (keeps playing through speakers, whilst sound plays through headphones 😍) until restart

So I've installed flexasio and would like to create an aggregate device! Simple?

Thanks in advance for any insights (and again for your excellent intermediary audio-driver-magic 🙏🏻)

My logs from scsynth (current best place known resource) - it's the Headphones and Speakers devices I'd like to aggregate, to then hopefully target as the outputs on the active aggregate device.

Device options:
  - MME : Microsoft Sound Mapper - Input   (device #0 with 2 ins 0 outs)
  - MME : Internal Microphone (Conexant I   (device #1 with 2 ins 0 outs)
  - MME : Stereo Mix (Conexant ISST Audio   (device #2 with 2 ins 0 outs)
  - MME : Microsoft Sound Mapper - Output   (device #3 with 0 ins 2 outs)
  - MME : Headphones (Conexant ISST Audio   (device #4 with 0 ins 2 outs)
  - MME : Speakers (Conexant ISST Audio)   (device #5 with 0 ins 6 outs)
  - Windows DirectSound : Primary Sound Capture Driver   (device #6 with 2 ins 0 outs)
  - Windows DirectSound : Internal Microphone (Conexant ISST Audio)   (device #7 with 2 ins 0 outs)
  - Windows DirectSound : Stereo Mix (Conexant ISST Audio)   (device #8 with 2 ins 0 outs)
  - Windows DirectSound : Primary Sound Driver   (device #9 with 0 ins 2 outs)
  - Windows DirectSound : Headphones (Conexant ISST Audio)   (device #10 with 0 ins 2 outs)
  - Windows DirectSound : Speakers (Conexant ISST Audio)   (device #11 with 0 ins 6 outs)
  - ASIO : FlexASIO   (device #12 with 2 ins 2 outs)
  - Windows WASAPI : Speakers (Conexant ISST Audio)   (device #13 with 0 ins 2 outs)
  - Windows WASAPI : Headphones (Conexant ISST Audio)   (device #14 with 0 ins 2 outs)
  - Windows WASAPI : Stereo Mix (Conexant ISST Audio)   (device #15 with 2 ins 0 outs)
  - Windows WASAPI : Internal Microphone (Conexant ISST Audio)   (device #16 with 2 ins 0 outs)
  - Windows WDM-KS : Headphones (Conexant ISST Audio headphone)   (device #17 with 0 ins 2 outs)
  - Windows WDM-KS : Microphone Array (Conexant ISST Audio capture)   (device #18 with 2 ins 0 outs)
  - Windows WDM-KS : Stereo Mix (Conexant ISST Stereo Mix)   (device #19 with 2 ins 0 outs)
  - Windows WDM-KS : Output 1 (Conexant ISST Audio output)   (device #20 with 0 ins 2 outs)
  - Windows WDM-KS : Output 2 (Conexant ISST Audio output)   (device #21 with 0 ins 6 outs)
  - Windows WDM-KS : Input (Conexant ISST Audio output)   (device #22 with 2 ins 0 outs)

Sample config file (where I'll reference the agg.dev, once created 🤞🏻)
https://github.com/sonic-pi-net/sonic-pi/blob/10de0b5a225ad9f1fcf58ce675b34300a829ff27/app/config/user-examples/audio-settings.toml#L5

## =================
## Soundcard Options
## =================

# sound_card_name = ""
# sound_card_sample_rate = 44100
# sound_card_buffer_size = 64
# num_inputs = 16
# num_outputs = 16

[iamjonny]

Update: I checked configuration, and ran portaudiodevices, and I see pins for the devices, just not sure if it's possible to declare the aggregate / virtual device in flexasio config...

I'm not sure if MME WASAPI ASIO or other is best, but for reference here's the target pins I'd like to plug in 🔌🔊🎧

Device index: 4
Device name: "Headphones (Conexant ISST Audio"
Default sample rate: 44100
Input: max channel count 0, default latency 0.09s (low) 0.18s (high)
Output: max channel count 2, default latency 0.09s (low) 0.18s (high)
Host API name: MME
Host API type: 2 [MME]
DEFAULT OUTPUT DEVICE for this host API

Device index: 5
Device name: "Speakers (Conexant ISST Audio)"
Default sample rate: 44100
Input: max channel count 0, default latency 0.09s (low) 0.18s (high)
Output: max channel count 6, default latency 0.09s (low) 0.18s (high)
Host API name: MME
Host API type: 2 [MME]

Thanks In Advance!

[dechamps]

It's not clear what you mean by "aggregate device", or what you're trying to achieve.

If you are trying to use multiple audio devices at the same time, then I'm afraid that's not possible with FlexASIO. See #58.

If, however, what you're looking for is automatic redirection between speakers and headphones when you switch devices, then that is doable, you just need to select the proper backend and device (search for "transparent" in that doc).

[iamjonny]

I've just learned (read) this "isn't an option on ASIO as it works with a device , but thanks for confirming, and elaborating on the auto-redirection use-case 👍🏻

[dechamps]

I've just learned (read) this "isn't an option on ASIO as it works with a device

To be clear, this is a limitation of FlexASIO, not ASIO in general. Most ASIO drivers will indeed only work with a single device at a time, but there is nothing, in theory, that prevents anyone from implementing an ASIO driver that talks to multiple devices simultaneously - and in fact, this is precisely what ASIO4ALL does.