peak hold on spectroscope / sweeping frequencies

MaxMSP
Leigh Marble's icon

Leigh Marble

It seems there should be an easy way to do this, but I'm stuck: I want a readout like spectroscope~ (in spectrogram mode), but where the peak frequencies are held until reset. This would give a clear picture of the frequency response, when sweeping frequencies through an object/circuit/room. Ala Spectrafoo, or FuzzMeasure.

Checking the possible messages you can send to spectroscope, I don't see any peak holding ability... anyone got some clever ideas?

Thanks,
Leigh

Trond Lossius's icon

Trond Lossius

Hi,

here is one solution using the FTM library. It should be possible to
recreate this using Jitter instead. FTM can be downloaded here:

Best,
Trond

Max Patch
Copy patch and select New From Clipboard in Max.

Leigh Marble's icon

Leigh Marble

Thanks for that idea. Unfortunately for me, the current version of FTM only runs on OS X 10.4, and I'm still at 10.3. Does anyone have an older, compatible copy they would be so kind as to email me?

Cheers,
Leigh

Trond Lossius's icon

Trond Lossius

There is info on how to install FTM 1.7.5 on OS 10.3 at the FTM wiki:

Best,
Trond

sfogar's icon

sfogar

Leigh,

there's a workaround for this...

Norbert Schnell (IRCAM) said:

------------------------------------

Hi friends of 10.3.9,

Just take the FTMlib.framework and copy it into /Library/Frameworks
and it should work.
It works for me!

------------------------------------

Not tried yet...

All the best

Alessandro Fogar

Leigh Marble's icon

Leigh Marble

Thanks for these tips, I missed them. I've got this patch working now on a 10.3.5 system.

Cheers,
Leigh

Trond Lossius's icon

Trond Lossius

While you are at it, you might also want to check out the help patch for
gpr.peaks. It is sort of related, tracking the N current peaks
(frequency and amplitude) in the specter.

Best,
Trond