Pure Data Novice here - you might have to speak slowly to me, so to speak.

I've been trying to get to grips with the fiddle~ object for a while now, but just can't handle it. Could someone please explain how I would use Fiddle to do the following:

1. Have a Wav file playing through 'readsf~' as Fiddle's input signal. the Wav file is a full song by Chemical brothers, with many different frequencies, constantly changing - in other words, it's not just a simple sinewave or sawwave etc.

2. detect a frequency range of 700-1100 Hz when it goes past a certain amplitude ( I can't tell you what that amp is, only that it's 6-12dB louder than the rest of the spectrum, sorry).

3. send output "1" to bng when the amp at this frequency is at an acceptable level, and output "0" when it is less than that amplitude.

Let me know if I havn't explained this right - I wouldn't be surprised, as I'm quite confused when it comes to fiddle~

i wouldn't use fiddle~ for what you are saying in (2).

i would put a couple of lowpass filters in series at (maybe just above) 1100hz, and then a couple of highpass filters in series at (just below) 700hz.

That would filter out most of the track that is not in that frequency range.

then, i would use [env~] to get a moving readout of the amplitude of that filtered signal. If you're looking for sustained sounds (opposed to quick hits like snare drums, for example), then a long [env~] window would probably be the way to go. Something like [env~ 4096] would give you about 100ms window at 44.1khz samplerate.

then you can just use some basic trial and error to figure out what level you need to set for the env~ output to trigger at, let's call that level 'xxx', and then it's just a simple [> xxx] which will give you a 1 when the level goes above xxx and a 0 when it is below.