alsa-project/alsa-lib issue #388 was opened from geoffreybennett:

I'm creating UCM2 profiles for the Focusrite USB interfaces. They support: ``` $ cat /proc/asound/Gen/stream0 Focusrite Scarlett 4i4 4th Gen at usb-0000:00:14.0-6.4.1, high speed : USB Audio

Playback: Status: Running Interface = 1 Altset = 1 Packet Size = 216 Momentary freq = 48000 Hz (0x6.0000) Interface 1 Altset 1 Format: S32_LE Channels: 6 Endpoint: 0x01 (1 OUT) (SYNC) Rates: 44100, 48000, 88200, 96000, 176400, 192000 Data packet interval: 125 us Bits: 24 Channel map: FL FR FC LFE RL RR

Capture: Status: Running Interface = 2 Altset = 1 Packet Size = 216 Momentary freq = 48000 Hz (0x6.0000) Interface 2 Altset 1 Format: S32_LE Channels: 6 Endpoint: 0x81 (1 IN) (SYNC) Rates: 44100, 48000, 88200, 96000, 176400, 192000 Data packet interval: 125 us Bits: 24 Channel map: FL FR FC LFE RL RR ``` When I use my UCM2 profile that splits the inputs and outputs up, PipeWire will only select 48kHz. The Pro Audio and Direct profiles can use all the sample rates.

To me it sounded like https://github.com/alsa-project/alsa-ucm-conf/issues/313 but @perexg advised https://github.com/alsa-project/alsa-ucm-conf/issues/313#issuecomment-198938...:

For configurations using split macros, the default rate is hardcoded to 48kHz in the alsa-lib direct plugins. It would be better to create a bug in alsa-lib issue tracker.

Issue URL : https://github.com/alsa-project/alsa-lib/issues/388 Repository URL: https://github.com/alsa-project/alsa-lib