Re: [chuck-users] sndBuf.valueAt (Forrest Curo asks)

Yeah, thanks! Though I ended up not needing an array, I'm pretty new to this, and can definitely can use help with the "everybody knows" stuff! Forrest On Mon, Apr 20, 2020 at 10:09 AM Jack Atherton wrote:

Hey Forrest,

The issue you're having with your float array is that 'float samples[];' is only declaring a null reference to an array. If you want it to refer to an actual array, you need to specify a length (e.g. float samples[ s.samples() ];)

ChucK arrays can also be resized (which I only found out recently! (: ), so you can also do this, for example:

float foo[0]; foo.size(4); <<< foo[0], foo[1], foo[2], foo[3] >>>;

~Jack

On Sun, Apr 19, 2020 at 1:43 PM Forrest Curo wrote:

...

Um. that works. So does this: SndBuf s => blackhole; "/home/forrest/chuck/examples/basic/om.wav" => s.read; float samples; 0 => int i; while (s.pos() < s.samples()) { <<< s.last() >>>; s.pos() => i; (s.valueAt(i)) => samples; <<< samples >>>; samp => now; }

I was having trouble trying to read a sndBuf like an array, or put its contents into an array. Maybe I was reading numbers off the end of the file. Declaring 'float samples[]; ' and doing 's.valueAt(i) => samples[i];'

got me a 'Null pointer' error.

Stumbling over syntax, I guess. Thanks for help!

On Sun, Apr 19, 2020 at 10:54 AM Perry Cook wrote:

...

This is truly odd. I don’t have easy means to test it. I don’t know why it wouldbe broken dependent on the dac, however.

For fun you might try something like this, just to verify that the valueAt() function is what’s busted.

SndBuf s => blackhole; “Fred.wav” => s.read;

while (s.pos() < s.samples()) { <<< s.last() >>>; samp => now; }

PRC

...

On Apr 19, 2020, at 9:00 AM, chuck-users-request@lists.cs.princeton.edu wrote:

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Today's Topics:

1. sndBuf.valueAt (Forrest Curo)

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Message: 1 Date: Sun, 19 Apr 2020 07:30:15 -0700 From: Forrest Curo To: ChucK Users Mailing List Subject: [chuck-users] sndBuf.valueAt Message-ID: Content-Type: text/plain; charset="utf-8"

Using chuck linux-jack this gives me reasonable numbers between -1 and

...

Using chuck linux-alsa I'm able to play the file I've read into sndBuf; but trying to copy it via .valueAt gives absurdly high ["out of range"] numbers at each point. [It can be a different high number different times I run chuck, but the number it is turns up at every point I sample.]

Is there a fix for this? Aside from using jack on a computer where it befnurgles the midi?