So - I am having tons o' fun with Stereo Tool, but right now I am in a bit of a jam - I hope someone can set me straight, because I am expected to install a working transmitter TODAY. (I have a workaround for now, but I need a permanent solution)
I am trying to find a way to print an audio file of the FM MPX output from ST - I of course tried Watchcat, but can't get it to work quite right. There are two problems. The main problem is that the files I am generating are not sounding right at the decoder. No stereo. I am playing them out of VLC to an Apogee Duet - the same card that I am using to push out live MPX, which is working brilliantly with the exact same settings.
I checked and rechecked my settings, but I think that WC not allowing me to set a custom bitrate is the problem, since I am using MP3's as the source.
The second problem is that Watchcat still watermarks all the files despite putting in my license and ensuring that I am not using any premium features. Just
make my file according to my preset (also, no fancy features) I wonder what I am doing wrong?
This probably seems like a nutty setup, but this is for a remote transmitter on a 30 minute loop that has to be stupid simple to operate. I want it all to turn on and off with one switch- I am thinking a HiRes player would be the most reliable, glitch-free approach.Up until now, we've used an iPod shuffle that just stays powered and playing even when the transmitter is off - has worked great for ~20 years. I hope I can keep this arrangement.
I've been pecking away at this for days, and I think I'm out of tricks. Your thoughts and suggestions would be deeply appreciated.
if i am understanding correctly what you are trying to do...
you are trying to save the live FM MPX output from ST to a file for later playback ?
if that is indeed the case, you will need to be sure the sample rate and audio encoding to the output file, is at 192Khz in RIFF (WAV) format respectively, in order to support the MPX pilot (i do not believe any type of audio compression will preserve the MPX).
i am not sure but i believe VLC will play the file without issue as long as the output of VLC is directed to your Apogee Duet and the output level of VLC matches your MPX live output from ST.
this is similar behavior to recording the baseband (I/Q) of a slice of RF spectrum for playback on the demodulating device.