On 9/13/07, Barry Samuels <[EMAIL PROTECTED]> wrote: > Debian Testing up to date as of yesterday. > Kernel 2.6.22 > Sound from on-board Intel (snd_hda_intel) > Kmix as the mixer > > When I used OSS I had no audio problems at all - everything (playback > and recording) just worked but since I went over to Alsa (about a year > ago) I've had trouble getting recording to work. > > Normally I find that playback gives no problems and I did for a short > period get playback and recording working properly then after a Debian > upgrade the recording stopped working properly again. > > If I try to record (arecord) using a microphone I cannot move the > recording volume slider above 70% otherwise I start getting extremely > distorted sound on playback (aplay) and although the recording volume > is adequate there is a loud background hum. If I reduce the recording > volume to about 60% the loud hum changes to a noticeable hiss but the > recorded voice is too low. > > I have to use the 'Digital' slider on the Kmix input tab to control > microphone volume - none of the other sliders seem to do anything. I > also have to have the first capture slider on (un-muted) to get any > sound at all but it makes no difference whether that slider is at the > bottom or not - it does not affect the volume. > > I also have a record deck with a USB connection which I last used under > OSS. The setup was working then and, as I remember, it was pretty > straightforward to set up. Since that time there have been many > Debian updates and I'm almost certainly using a later kernel and I'm > now using Alsa. > > When I came to use it this time in conjunction with Audacity, which I > was using last time, I can't get a peep out of it. > > I have tried various inputs without success. The appropriate modules > are loaded including snd_usb_audio. > > When the USB lead is plugged in I get this in the logs: > > kernel: usb 1-7.1: new full speed USB device using ehci_hcd and address > 6 > kernel: usb 1-7.1: configuration #1 chosen from 1 choice > kernel: input: Burr-Brown from TI > USB Audio CODEC as /class/input/input4 > kernel: input: USB HID v1.00 Device [Burr-Brown from TI > USB Audio CODEC ] on usb-0000:00:1d.7-7.1 > kernel: usbcore: registered new interface driver snd-usb-audio > > a little further on in the log I see: > > kernel: cannot submit datapipe for urb 0, error -28: not enough > bandwidth > > Originally I got this in the log: > > kernel: cannot submit datapipe for urb 0, error -38: enable > CONFIG_USB_EHCI_SPLIT_ISO to play through a hub > > so I enabled that in the kernel and recompiled although I'm not using a > USB hub and then got the 'not enough bandwidth' error. > > As you may have gathered I'm beginning to take a dislike to Alsa. > > Can anyone suggest some fault tracing procedures please? > > -- > Barry Samuels > http://www.beenthere-donethat.org.uk > The Unofficial Guide to Great Britain > >
I use ALSA on KDE(Lenny), and krecord is used to record sound from microphone. It works fine. I can hear the sound clearly. Maybe it's the problem of your mixer that it was not configured fine? -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
