retitle 523925 fmit: no sound seems to be captured thanks
On Sun, 26 Jul 2009 18:57:58 +0200 John Wright wrote:
[...]
> Sorry again for not getting on this months ago...
OK, I am trying again to get fmit working on my box.
As I previously stated (see the bug log) I was in the course of
switching to jackd.
During last summer I managed to get a working jackd configuration (with
ALSA backend). It works for audio "output" (with audacious, mplayer,
and also with ALSA clients, since I redirect their ALSA output to
jackd, thanks to libasound2-plugins and a simple ~/.asoundrc).
After being busy in various other things, I am now trying to make audio
"input" work correctly.
Hence, now I am testing fmit with jackd transport (rather than ALSA
transport).
When I start fmit, it now auto-detects JACK transport:
$ fmit
Free Music Instrument Tuner version 0.97.7 built at Dec 21 2009 08:42:18
Install directory '/usr'
CaptureThread: INFO: Built in transports
SSE2 detected
CaptureThread: INFO: available JACK Jack Audio Connection Kit
CaptureThread: INFO: OK ALSA Advanced Linux Sound Architecture
(lib:1.0.21a)
CaptureThread: INFO: N/A (No such file or directory) OSS Open Sound
System (lib:30802)
CaptureThread: INFO: Auto detecting a working transport ... SSE2 detected
using JACK
CaptureThread: INFO: using JACK transport
SSE2 detected
CombedFT: INFO: window size=3207 FFT size=4096 window size factor=4 zero
padding factor=1
CaptureThread: INFO: format is signed float 32bits with 1 channel(s)
Please note that jackd was already running, since there's audacious
running (but not playing!).
When I pick guitar strings, I can hear their clean sound coming out of
my speakers, but no sound seems to be captured by fmit (flat captured
sound graph, and everything else shows no sign of activity). :-(
After thinking "Ah, OK, I must connect ports for jackd!", I start
qjackctl and connect system:capture_1 and system:capture_2 to
fmit:input. Then I press the play-like button on qjackctl GUI
("Start transport rolling": is it really needed?).
Nothing seems to change: again, I hear the clean sound, but fmit does
nothing. :-(
Let's try another application, then.
I install rakarrack and test it.
I can hear the clean sound, but no effect seems to be applied by
rakarrack, whatever preset I may select.
I also tried to mess things around with qjackctl, with no result.
Another test with fmit.
I start fmit while audacious is playing metal music from an Internet
radio. After connecting audacious-jack_11033_001:out_0 and
audacious-jack_11033_001:out_1 to fmit:input (by using qjackctl), I
can see that fmit is capturing sound and detecting notes (with
errors and all the rest).
I don't know how trustworthy fmit can be, when used in this manner (I
mean, is it able to really recognize the main melody of a song? despite
all the other notes played at the same time, despite distortion and
other effects that are typically present in the music I usually listen
to?), but anyway, it is doing something!
This seems to imply that my problem is in capturing sounds from the
sound card mic-in line and in routing them to the correct destination.
[...]
> When you get an opportunity, try to run
>
> arecord -f cd /tmp/capture.wav
>
> with the above mixer settings. If the resulting .wav has no data in it,
> then it's an alsa problem. But if it records fine, yet FMIT still
> doesn't work, then it's probably an FMIT issue. I can't reproduce the
> problem here, but I'll try to think of some other things to try. :-/
I shut jackd down, moved ~/.asoundrc and ~/.jackdrc away and performed
the above-described test.
I created some 38 s of nice silence.
So, it seems that I am not smart enough to properly configure a
GNU/Linux box for audio processing.
Only audio playing works for me! :-(
I am beginning to think that there's something wrong with me (not even
with my box, with me!).
Do you have any idea on how I can figure out what's wrong (with me)?
Any help will be appreciated.
--
http://www.inventati.org/frx/progs/scripts/pdebuild-hooks.html
Need some pdebuild hook scripts?
..................................................... Francesco Poli .
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