Hiya folks,
I'm a linux guy, but a newbie to the sound/multimedia
stuff. I'm trying to set up a timeshifting FM radio
kinda thing.
Here's my setup ...
. redhat 8.0 running 2.4.20-19.7
. alsa-0.9.6
. the motherboard has on-board audio,
but i've been using a Turtle Santa Cruz Card.
. d-link DSB-R100 usb fm tuner
I've been able to tune the radio and play it through
the speakers, but not record from it. Or, rather, I
don't hear anything when I try to replay the mp3, so
it could be the capture or the encoding that fails.
The fm timeshifting pages recommend using sox to
capture audio and lame/notlame to encode it. I
gather that alsa might be something of an overkill
for this. I was mainly just trying to adopt something
current with an active user base.
So ... questions:
. I'm still a little unclear on the relationship
between sound drivers and applications. Now that
I've loaded alsa, do I need to limit myslef to
alsa-aware capture, encoding, and playback apps?
. If so, can arecoord capture from /dev/radio, or
is that governed by the USB drivers?
. Any reason that sox to capture and notlame to encode
shouldn't work? I've been doing this:
# unmute and tune the radio
$ rtune -m 1 -s 106100 /dev/radio
# capture audio and pipe to coder
$ sox -t ossdsp /dev/dsp -w -r 44100 -t cdr - | \
notlame -k -v -S - /tmp/my.mp3
Suggestions, pointers, and even answers are welcome.
Thanks in advance.
- gary
All sorts of system details are below:
$ lsmod
Module Size Used by Not tainted
snd-seq-midi 5312 0 (autoclean) (unused)
snd-seq-oss 34720 0 (unused)
snd-seq-midi-event 6048 0 [snd-seq-midi
snd-seq-oss]
snd-seq 47280 2 [snd-seq-midi
snd-seq-oss snd-seq-midi-event]
snd-pcm-oss 45284 0
snd-mixer-oss 16408 0 [snd-pcm-oss]
snd-cs46xx 80636 0
snd-rawmidi 18656 0 [snd-seq-midi
snd-cs46xx]
snd-seq-device 6284 0 [snd-seq-midi
snd-seq-oss snd-seq snd-rawmidi]
snd-ac97-codec 50264 0 [snd-cs46xx]
snd-pcm 85344 0 [snd-pcm-oss
snd-cs46xx]
snd-timer 19588 0 [snd-seq snd-pcm]
snd 43108 0 [snd-seq-midi
snd-seq-oss snd-seq-midi-event snd-seq snd-pcm-oss
snd-mixer-oss snd-cs46xx snd-rawmidi snd-seq-device
snd-ac97-codec snd-pcm snd-timer]
soundcore 6372 8 [snd]
gameport 3440 0 [snd-cs46xx]
snd-page-alloc 9876 0 [snd-cs46xx snd-pcm]
smbfs 38944 1 (autoclean)
sr_mod 16344 0 (autoclean)
radeon 112728 10
agpgart 45024 3
autofs 11588 0 (autoclean) (unused)
3c59x 28456 1
ipt_REJECT 3936 2 (autoclean)
iptable_nat 21588 0 (autoclean) (unused)
ip_conntrack 25684 1 (autoclean)
[iptable_nat]
iptable_filter 2496 1 (autoclean)
ip_tables 13824 5 [ipt_REJECT
iptable_nat iptable_filter]
ide-scsi 10912 0
scsi_mod 106252 2 [sr_mod ide-scsi]
ide-cd 32160 0
cdrom 32096 0 [sr_mod ide-cd]
ohci1394 18688 0 (unused)
ieee1394 44904 0 [ohci1394]
ext3 65536 4 (autoclean)
jbd 47148 4 (autoclean) [ext3]
dsbr100 4960 0
videodev 7904 1 [dsbr100]
mousedev 5120 0 (unused)
keybdev 2528 0 (unused)
hid 20896 0 (unused)
input 5728 0 [mousedev keybdev
hid]
ehci-hcd 18304 0 (unused)
usb-ohci 20480 0 (unused)
usbcore 73472 1 [dsbr100 hid ehci-hcd
usb-ohci]
$ rtune -i /dev/radio
--- INTERFACE DATA ---
Interface Name: D-Link R-100 USB FM Radio
Number of Tuner Channels: 1
Number of Audio Devices: 1
Capability Flags:
VID_TYPE_TUNER
--- TUNER DATA ---
Tuner Name: DSB R-100
Tuner Number: 0
Tuner Low Frequency: 87500.0 kHz
Tuner High Frequency: 108000.0 kHz
Current Frequency: 106100.0 kHz
Current Signal Strength: 0 uV
Current Mode: AUTO or RADIO
Capability Flags:
VIDEO_TUNER_LOW
--- AUDIO DATA ---
Channel Name: Radio
Channel Number: 0
Channel Step-size: 1
Audio is Mutable
Current Mode: STEREO
sox 12.17.3
notlame 3.92
alsa 0.9.6
$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: CS46xx [Sound Fusion CS46xx], device 0: CS46xx
[CS46xx]
Subdevices: 1/1
Subdevice #0: subdevice #0
$ sox -t ossdsp /dev/dsp -w -r 44100 -t cdr - |
notlame -v -k -S - /tmp/my.mp3
Assuming raw pcm input file
LAME version 3.92 (http://www.mp3dev.org/)
polyphase lowpass filter disabled
Encoding <stdin> to /tmp/my.mp3
Encoding as 44.1 kHz VBR(q=4) j-stereo MPEG-1 Layer
III (ca. 9.1x) qval=2
=====
--
Gary Cote
[EMAIL PROTECTED]
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