On Tue, 2017-09-05 at 19:25 +0200, Joakim Tjernlund wrote:

When starting a audio chat I often have problems with my microphon and recenly I found that the sample rate is different for in and out: # > cat /proc/asound/card1/stream0 Logitech Inc Logitech Stereo H650e at usb-0000:00:1d.0-1.7, full speed : USB Audio

Playback: Status: Running Interface = 2 Altset = 1 Packet Size = 192 Momentary freq = 48000 Hz (0x30.0000) Interface 2 Altset 1 Format: S16_LE Channels: 2 Endpoint: 1 OUT (ADAPTIVE) Rates: 8000, 16000, 24000, 32000, 44100, 48000

Capture: Status: Running Interface = 1 Altset = 1 Packet Size = 200 Momentary freq = 44100 Hz (0x2c.199a) Interface 1 Altset 1 Format: S16_LE Channels: 2 Endpoint: 1 IN (ASYNC) Rates: 8000, 16000, 24000, 32000, 44100, 48000

This seems odd to me. Adding some debug to kernel I see: [ 129.858365] usb 1-2: 1:1: setting freq 44100 to ep 0x81 [ 129.860514] usb 1-2: 1:1: setting freq 44100 to ep 0x81 [ 131.884314] usb 1-2: 2:1: setting freq 44100 to ep 0x1 [ 131.886567] usb 1-2: 2:1: setting freq 44100 to ep 0x1 [ 131.898714] usb 1-2: 2:1: setting freq 48000 to ep 0x1 [ 131.900847] usb 1-2: 2:1: setting freq 48000 to ep 0x1

Is this expected or should I try make both the same?

Jocke

Ping?