Re: USB microphone does not get the required bandwidth

2019-02-15 Thread Michael Häckel
Thank you for the reply. Ok, I will read the specification about isochronous transfers and check, whether I can do something or not. The specification is indeed quite long. A long time ago I was quite active in open source development, but I didn't expect that I will ever dive so deep into the k

Re: USB microphone does not get the required bandwidth

2019-02-14 Thread Alan Stern
On Thu, 14 Feb 2019, Michael [ISO-8859-1] H�ckel wrote: > Hi, > > With kernel 4.20.8 as well as 5.0-rc6 I have the following problem. > I have an AT2020USBi microphone from audio-technica. This is a full speed USB > device which supports 24 bit audio at up to 96 kHz. Although the hardware is >

USB microphone does not get the required bandwidth

2019-02-14 Thread Michael Häckel
Hi, With kernel 4.20.8 as well as 5.0-rc6 I have the following problem. I have an AT2020USBi microphone from audio-technica. This is a full speed USB device which supports 24 bit audio at up to 96 kHz. Although the hardware is only mono it requestes a wMaxPacketSize of 576 corresponding to 24 bi