[PlanetCCRMA] ams - no sound?

Fernando Lopez-Lezcano nando@ccrma.Stanford.EDU
Fri Nov 11 19:56:01 2005

On Fri, 2005-11-11 at 22:05 -0500, Mike Lococo wrote:
> Greetings,
> I apologize in advance if this is a stupid question, I'm near the 
> beginning of my learning curve here.  I'm just starting to experiment 
> with Alsa Modular Synth, and having trouble getting sound output.
> If I attempt to start it with just "ams", then I get and error that 
> "Alsa_driver: can't set playback sample rate to 44100. Can't connect to 
> ALSA".  However I can play 44100 wav files with aplay.  So I'm confused 
> as to why ams is having trouble accessing my sound card.
> But I'll try another way... if I start the jack daemon, I can run ams 
> with "ams --jack", but I get no sound output. 

Make sure that the outputs of ams are connected in the jack patch panel.
Some Jack apps autoconnect the outputs, some don't, I don't remember
which type is ams. You should probably start Jack with Qjackctl and
there you will have a connections tool you can use to connect ams to the
soundcard outputs. 

-- Fernando

>  Either with any of the 
> demo patches suggested in the online tutorial, or by running a vco 
> straight into a PCM output.  If I monitor the output with the a scope 
> view module, I see waves so I feel like ams is doing it's thing.  But 
> there's no sound.  I haven't tried adding a "jack out" as suggested in 
> the documentation because I can't find such a module or LADSPA plugin.
> Also, although I have no idea what it means I can run the command 
> "ecasound -f:32,1,48000 -i null -o jack_alsa,myport -b:1024 
> -el:sine_fcac,440,1" and get output through the jack server.  So I feel 
> like jack is working alright.
> My system is running fedora core 4, with the CCRMA repository 
> configured.  I'm currently running the FC4 stock kernel, but can boot up 
> the CCRMA kernel if it sounds like my problem might be related to that.
> Sorry if this message has run long, I'm trying to cast a wide net and 
> also make it clear that I've at least attempted to read the relevant 
> docs before whining.  Thanks in advance for any help you can give.