tone generator

[Ken Norris]

Howdy,

Has anyone developed a project that delivers a continuous tone ... and of variable frequencies (no sense reinventing the wheel)?

[marksch]

Ken,

I have the source (not my own) of a MikMod external for Revolution, which does this. Someone might be able to use this to create a similar external for SuperCard.

Best,

Mark

[Ken Norris]

I have the source (not my own) of a MikMod external for Revolution, which does this. Someone might be able to use this to create a similar external for SuperCard.

Hmm ... I wonder: Why would we need an external? I'd think Quicktime could do it. But I haven't succeeded in getting it to do it with SC.

If anyone is interested, I want to use it as audio source for fine tuning a transmitter to resonance ... very tedious work, might take a few days. I want to retain modulation at an even level and frequency ... the fewer introduction of variables the better at this stage.

[marksch]

Hi Ken,

Maybe you need to explain what your definition of a tone generator is.

Best,

Mark

[Ken Norris]

It'a OK, I found one and it works quite well:
http://www.nch.com.au/tonegen/

I would have liked to make a SC version I can integrate with other stuff. For example, I could tell it to feed my internet station with data on the frequency for testing, use it to test default connections to the network for EAS (Emergency Alert System) information, etc.
http://www.fcc.gov/pshs/services/eas/

[ccrreutz]

I also need a tone generator (tone means something I can hear)

SC 3.x almost had one with the script word "play". Any ideas?

[supercardus]

To the best of my knowledge QuickTime has no single sine wave oscillator, but it does have a music synthesizer built up of the 128 general midi instrument voices. You can call these voices with the play instrument command but you are limited in length to a whole note.

Code: Select all

play instrument 1 "c3w" -- where 1=instrument number; c=note; 3=octave, w=note duration (whole note)


See the play instrument entry in the Language Guide for more info.