At 12:46 AM 9/19/2007, Clemens Ladisch wrote:
>Steve Strobel wrote:
> > If I set up the snd_pcm_hardware_t structure with
> >
> > .formats = SNDRV_PCM_FMTBIT_U32_LE,
> >
> > the OSS test application sends a nice sine wave, but aplay fails with
> > the following messages:
> >
> > root:~> aplay < /dev/urandom
> > ALSA sound/blackfin/ad1836.c:1050: snd_ad1836_playback_open
> > Playing raw data 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Mono
> > snd_pcm_hw_refine()
> > ACCESS = 00000000ffffffffffffffff -> 0000000000000008
> > FORMAT = 0000000000000400 -> 0000000000000000
>
>aplay tries to set S32_LE, but the driver doesn't accept it.
>
>Where does this S32_LE come from? Did you set up some devices in
>~/.asoundrc or /etc/asound.conf
I don't have either of those files.
>or did you create a card-specific .conf file for your controller?
Not intentionally, but there might be one left over from the AD1836
driver I started with (I have just been modifying that driver,
planning to rename it after I get it working). Where would I look
for such a file?
The only reference to "alsa" in my /etc directory is in modprobe.conf:
root:~> cat
/etc/modprobe.conf
# ALSA native device
support
alias char-major-116
snd
options snd major=116
cards_limit=1
alias snd-card-0
snd-ad1836
#OSS/Free
setup
alias char-major-14
soundcore
alias sound-slot-0
snd-ad1836
alias sound-service-0-0
snd-mixer-oss
alias sound-service-0-3
snd-pcm-oss
>(I would guess that the "default" device is set up to use dmix.)
How would I determine that? Sorry for the elementary questions; I
am new to ALSA. I don't know if this answers the question, but
"aplay -L" includes the following line: "default 'cards.pcm.default'
". Complete output shown below.
>Regards,
>Clemens
Thanks for your help,
Steve
root:/mnt/Blackfin/Sound Files> aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ad1836 [ADI ad1836], device 0: AD1836_PCM [AD1836_PCM]
Subdevices: 1/1
Subdevice #0: subdevice #0
root:/mnt/Blackfin/Sound Files> aplay -L
PCM list:
hw {
@args.0 CARD
@args.1 DEV
@args.2 SUBDEV
@args.CARD {
type string
default {
@func getenv
vars {
0 ALSA_PCM_CARD
1 ALSA_CARD
}
default {
@func refer
name 'defaults.pcm.card'
}
}
}
@args.DEV {
type integer
default {
@func igetenv
vars {
0 ALSA_PCM_DEVICE
}
default {
@func refer
name 'defaults.pcm.device'
}
}
}
@args.SUBDEV {
type integer
default {
@func refer
name 'defaults.pcm.subdevice'
}
}
type hw
card $CARD
device $DEV
subdevice $SUBDEV
}
plughw {
@args.0 CARD
@args.1 DEV
@args.2 SUBDEV
@args.CARD {
type string
default {
@func getenv
vars {
0 ALSA_PCM_CARD
1 ALSA_CARD
}
default {
@func refer
name 'defaults.pcm.card'
}
}
}
@args.DEV {
type integer
default {
@func igetenv
vars {
0 ALSA_PCM_DEVICE
}
default {
@func refer
name 'defaults.pcm.device'
}
}
}
@args.SUBDEV {
type integer
default {
@func refer
name 'defaults.pcm.subdevice'
}
}
type plug
slave.pcm {
type hw
card $CARD
device $DEV
subdevice $SUBDEV
}
}
plug {
@args.0 SLAVE
@args.SLAVE {
type string
}
type plug
slave.pcm $SLAVE
}
shm {
@args.0 SOCKET
@args.1 PCM
@args.SOCKET {
type string
}
@args.PCM {
type string
}
type shm
server $SOCKET
pcm $PCM
}
tee {
@args.0 SLAVE
@args.1 FILE
@args.2 FORMAT
@args.SLAVE {
type string
}
@args.FILE {
type string
}
@args.FORMAT {
type string
default raw
}
type file
slave.pcm $SLAVE
file $FILE
format $FORMAT
}
file {
@args.0 FILE
@args.1 FORMAT
@args.FILE {
type string
}
@args.FORMAT {
type string
default raw
}
type file
slave.pcm null
file $FILE
format $FORMAT
}
null {
type null
}
cards 'cards.pcm'
front 'cards.pcm.front'
rear 'cards.pcm.rear'
center_lfe 'cards.pcm.center_lfe'
side 'cards.pcm.side'
surround40 'cards.pcm.surround40'
surround41 'cards.pcm.surround41'
surround50 'cards.pcm.surround50'
surround51 'cards.pcm.surround51'
surround71 'cards.pcm.surround71'
iec958 'cards.pcm.iec958'
spdif 'cards.pcm.iec958'
modem 'cards.pcm.modem'
phoneline 'cards.pcm.phoneline'
default 'cards.pcm.default'
dmix 'cards.pcm.dmix'
dsnoop 'cards.pcm.dsnoop'
root:/mnt/Blackfin/Sound Files>
---
Steve Strobel
Link Communications, Inc.
1035 Cerise Rd
Billings, MT 59101-7378
(406) 245-5002 ext 102
(406) 245-4889 (fax)
WWW: http://www.link-comm.com
MailTo:steve.strobel@xxxxxxxxxxxxx
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