I've been playing with ALSA for the past couple of weeks, mostly to get GnomeMeeting working (the OSS driver for my chip doesn't support full duplex).
When I play music using OSS emulation, everything sounds great (incidentally, the sound is much richer than when using the OSS drivers). But when I use a native ALSA application (such as MPlayer with "-ao alsa9"), the pitch is too high, and the music is played too quickly.
Also, I can record using arecord with no problems, but recording using OSS doesn't work:
$ rec wee.wav Send break (control-c) to end recording $
rec aborts straight away, and writes only a 4kB file (containing only a RIFF header and no data). Other OSS programs (such as gnome-sound-recorder usually hang.
Yet another oddity is alsamixer:
$ alsamixer Segmentation fault $
aumix works fine, though.
To sum things up, these are the issues: * Sound played too quickly (48 kHz instead of 44.1 kHz?) * Cannot record using OSS (rec aborts, writing only a header) * alsamixer segfaults.
# lsmod
Module Size Used by Not tainted
snd-seq-oss 34496 0 (unused)
snd-pcm-oss 45380 0
snd-mixer-oss 16312 0 [snd-pcm-oss]
snd-intel8x0 23076 0
snd-seq-midi-event 6016 0 [snd-seq-oss]
snd-seq 46480 2 [snd-seq-oss snd-seq-midi-event]
ircomm-tty 26080 0 (autoclean)
ircomm 10984 0 (autoclean) [ircomm-tty]
snd-pcm 84868 0 (autoclean) [snd-pcm-oss snd-intel8x0]
snd-timer 19364 0 (autoclean) [snd-seq snd-pcm]
snd-ac97-codec 49720 0 (autoclean) [snd-intel8x0]
snd-page-alloc 9876 0 (autoclean) [snd-intel8x0 snd-pcm]
snd-mpu401-uart 5056 0 (autoclean) [snd-intel8x0]
snd-rawmidi 18624 0 (autoclean) [snd-mpu401-uart]
snd-seq-device 6188 0 (autoclean) [snd-seq-oss snd-seq snd-rawmidi]
snd 43012 0 (autoclean) [snd-seq-oss snd-pcm-oss snd-mixer-oss snd-intel8x0 snd-seq-midi-event snd-seq snd-pcm snd-timer snd-ac97-codec snd-mpu401-uart snd-rawmidi snd-seq-device]
soundcore 6468 5 (autoclean) [snd]
parport_pc 19076 1 (autoclean)
lp 9060 0 (autoclean)
parport 37056 1 (autoclean) [parport_pc lp]
irtty 7968 2 (autoclean)
irda 123472 0 (autoclean) [ircomm-tty ircomm irtty]
sd_mod 13772 0 (autoclean) (unused)
autofs 13364 0 (autoclean) (unused)
ds 8680 2
yenta_socket 13536 2
pcmcia_core 57248 0 [ds yenta_socket]
sis900 16684 1
ipt_REJECT 4024 6 (autoclean)
iptable_filter 2444 1 (autoclean)
ip_tables 15776 2 [ipt_REJECT iptable_filter]
sg 36492 0 (autoclean)
sr_mod 18168 0 (autoclean)
floppy 58076 0 (autoclean)
microcode 4700 0 (autoclean)
ide-scsi 12208 0
scsi_mod 108088 4 [sd_mod sg sr_mod ide-scsi]
ide-cd 35712 0
cdrom 33760 0 [sr_mod ide-cd]
ohci1394 28968 0 (unused)
ieee1394 204196 0 [ohci1394]
keybdev 2976 0 (unused)
mousedev 5556 1
hid 24708 0 (unused)
input 5888 0 [keybdev mousedev hid]
usb-ohci 21512 0 (unused)
usbcore 79136 1 [hid usb-ohci]
ext3 73732 2
jbd 52084 2 [ext3]
# lspci
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 650 Host (rev 01)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] SiS 530 Virtual PCI-to-PCI bridge (AGP)
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] 85C503/5513 (rev 10)
00:02.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 07)
00:02.3 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 07)
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev d0)
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] Sound Controller (rev a0)
00:03.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900 10/100 Ethernet (rev 90)
00:0a.0 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev a8)
00:0a.1 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev a8)
00:0a.2 FireWire (IEEE 1394): Ricoh Co Ltd R5C552 IEEE 1394 Controller
00:0c.0 Communication controller: Conexant HSF 56k HSFi Modem (rev 01)
01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] SiS650/651/M650/740 PCI/AGP VGA Display Adapter
Any help would be greatly appreciated.
Regards, -- David Polberger Computer Science major, Lund University, Sweden (Currently at University of California, Santa Cruz, USA)
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