Re: Scratchy playback issue with USB CLASS2 audio device
Hi, I modified uaudio.c according to your patch but it didn't make any difference. I'm running 10.0-stable. It doesn't matter with vchan adaptive/fixed or bitperfect settings. Behavior is same. I don't know how to read usbdump output thus I'm mailing 5 sec. playback output file to you (1.5MB zipped). It captured while vchan at 16bit/48Khz. I keen on any other suggestion from you. I don't know why but sound quality is obviously better in FreeBSD despite this playback issue still remains. Regards, Taner On Sat, Oct 19, 2013 at 9:42 AM, Hans Petter Selasky wrote: > On 10/19/13 08:35, Hans Petter Selasky wrote: > >> On 10/19/13 07:46, Taner wrote: >> >>> uaudio_chan_play_sync_**callback: Value = 0x0005fff8 >>> uaudio_chan_play_sync_**callback: Comparing 47998 < 48000 >>> uaudio_chan_play_sync_**callback: Value = 0x0005fff6 >>> uaudio_chan_play_sync_**callback: Comparing 47998 < 48000 >>> >> >> Hi, >> >> The normal for adaptive rates is that this value should tilt just above >> or below the 48000 or whatever is there. Else something is wrong. >> >> Did you try to record while playing? >> >> Also, are you running -stable? >> >> Could also check the amount of samples sent by using >> "usbdump -i usbusX -f Y -s 65536 -vvv" >> >> --HPS >> > > Hi, > > Does this patch make any difference? > > === dev/sound/usb/uaudio.c > ==**==**== > --- dev/sound/usb/uaudio.c (revision 256754) > +++ dev/sound/usb/uaudio.c (local) > @@ -2070,7 +2070,7 @@ > chn_intr(ch->pcm_ch); > > /* start SYNC transfer, if any */ > - if ((ch->last_sync_time++ & 7) == 0) > + if ((ch->last_sync_time++ & 3) == 0) > usbd_transfer_start(ch->xfer[**UAUDIO_NCHANBUFS]); > > case USB_ST_SETUP: > > --HPS > ___ freebsd-usb@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"
Re: Scratchy playback issue with USB CLASS2 audio device
On 10/19/13 08:35, Hans Petter Selasky wrote: On 10/19/13 07:46, Taner wrote: uaudio_chan_play_sync_callback: Value = 0x0005fff8 uaudio_chan_play_sync_callback: Comparing 47998 < 48000 uaudio_chan_play_sync_callback: Value = 0x0005fff6 uaudio_chan_play_sync_callback: Comparing 47998 < 48000 Hi, The normal for adaptive rates is that this value should tilt just above or below the 48000 or whatever is there. Else something is wrong. Did you try to record while playing? Also, are you running -stable? Could also check the amount of samples sent by using "usbdump -i usbusX -f Y -s 65536 -vvv" --HPS Hi, Does this patch make any difference? === dev/sound/usb/uaudio.c == --- dev/sound/usb/uaudio.c (revision 256754) +++ dev/sound/usb/uaudio.c (local) @@ -2070,7 +2070,7 @@ chn_intr(ch->pcm_ch); /* start SYNC transfer, if any */ - if ((ch->last_sync_time++ & 7) == 0) + if ((ch->last_sync_time++ & 3) == 0) usbd_transfer_start(ch->xfer[UAUDIO_NCHANBUFS]); case USB_ST_SETUP: --HPS ___ freebsd-usb@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"
Re: Scratchy playback issue with USB CLASS2 audio device
On 10/19/13 07:46, Taner wrote: uaudio_chan_play_sync_callback: Value = 0x0005fff8 uaudio_chan_play_sync_callback: Comparing 47998 < 48000 uaudio_chan_play_sync_callback: Value = 0x0005fff6 uaudio_chan_play_sync_callback: Comparing 47998 < 48000 Hi, The normal for adaptive rates is that this value should tilt just above or below the 48000 or whatever is there. Else something is wrong. Did you try to record while playing? Also, are you running -stable? Could also check the amount of samples sent by using "usbdump -i usbusX -f Y -s 65536 -vvv" --HPS ___ freebsd-usb@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"
