mic, jack, chuck, soundfiles, binaural soundfiles

[STEP #1]

Play slates.wav from chuck in mono:

Just enter this into the miniAudicle editor and shred it ("+" on the miniAudicle editing window)

SndBuf snd0 => dac.chan(0); // connect a sndBuf to 1^st speaker

"220a/hw2/slates.wav" => snd0.read; // play file from beginning

1::day => now; // stall for 1 day

Save as a file called “slates.ck”.

[STEP #2]

Now play slates.wav from chuck in quad, all four channels together:

Extend the above to 4 SndBuf's each with a different name, each going to a different output channel; e.g., the second would be

... // copy first 2 lines from above code-block to have 1^st speaker as channel 0

SndBuf snd1 => dac.chan(1); // 2^nd speaker as channel 1

"220a/hw2/slates.wav" => snd1.read; // same file, to send to the buffer connected to channel 1

... // repeat for 3^rd and 4^th speakers

1::day => now; // stall for 1 day

(You can overwrite slates.ck with this new code).

[FINAL STEP]

And now, play slates.wav from chuck in quad, each channel announced separately, by doing the following:

(1) after the beginning declarations, mute each Sndbuf, with e.g.,

snd0.gain(0.0); // mute by reducing gain to 0.0

(2) then make an infinite pattern by replacing the above line for stalling for 1 day with this loop:

while (true) // loop the following block

{

snd0.gain(1.0); // unmute snd0 by setting gain to 1.0

snd0.pos(28000); // play from position 28000 samples

63750::samp=>now; // stall for length of utterance

snd0.gain(0.0); // mute snd0

500::ms=>now; // stall for half second

// ...do next channels...

}

Hint: These positions and lengths in samples can be measured directly in Audacity by right-clicking on the time measures that show at the bottom of the app. Set the format to read in samples. Make a copy of your completed slates.ck it in your homework factory directory (~/Library/Web/220a/slates.ck).

[STEP #1]

Download "binaural.ck" (https://ccrma.stanford.edu/courses/220a/ck/binaural/binaural.ck) and open it in miniAudicle.

[STEP #2]

Make a copy of slates.ck, naming it “binauralSlates.ck”, and replace all dac.chan(n) references with Binaural.pssp[n] (where n = channel number).

Note the syntax difference between “()” and “[]” above...

[STEP #3]

Shred binaural.ck and then shred binauralSlates.ck to hear it come out of 4 “psuedo speakers” in your headphones.

IMPORTANT (If using your laptop): You need to download 8 wave files from https://ccrma.stanford.edu/courses/220a/ck/binaural/ir4ch/, and change the file path in binaural.ck (around line 18) to point to those files!

Note that you can shred (add/remove, "+"/"-") binauralSlates.ck repeatedly, but you can only shred binaural.ck once, else the miniAudicle's console will complain that "class/type 'Binaural' is already defined in namespace 'global' ", and you have to restart miniAudicle...

[STEP #4]

Finally, if working from a laptop download "recBinauralTmp.ck" from https://ccrma.stanford.edu/courses/220a/ck/binaural/recBinauralToTmp.ck or if working from a house linux machine download "recBinauralZap.ck" from https://ccrma.stanford.edu/courses/220a/ck/binaural/recBinauralToZap.ck. (These write into the most likely "scratch" directories).

(The previous direction used to read: Finally, download "recBinaural.ck" from https://ccrma.stanford.edu/courses/220a/ck/binaural/recBinaural.ck.)

While playing the loop (binaural.ck and binauralSlates.ck), add shred of recBinaural.ck to capture the two headphone channels to two mono files.

Currently, recBinaural.ck will remove shred automatically after 10seconds. If you try to manually remove shred before that time is up, recordings will not be made. You can modify this default length of 10 seconds by changing the value chucked to the variable s, around line 8 of recBinaural.ck.

IMPORTANT (if using your laptop): You may need to change the path for filename0 (around line 14) and filename1 (around line 16) of recBinaural.ck to where you want your two mono files to be saved.

[STEP #5]

From the miniAudicle console, copy the SoX command that prints after 10 seconds and paste that into a terminal to merge the two mono files into a stereo file. The idea is to write your files into a temporary directory. On a laptop, the directory should be /tmp but on a house linux machine it should be /zap.

Here's the laptop command: sox -M /tmp/chuckout-0.wav /tmp/chuckout-1.wav /tmp/merged-stereo.wav

Here's the house linux command: sox -M /zap/chuckout-0.wav /zap/chuckout-1.wav /zap/merged-stereo.wav

(The previous direction used to read: sox -M /tmp/chuckout-0.wav /tmp/chuckout-1.wav /tmp/merged-stereo.wav )

IMPORTANT (if using your laptop): (1) You will need to download SoX. (2) Then, when typing your sox command in the terminal, you'll also need to modify the paths for these two files as well as for merged-stereo.wav accordingly, as you've specified in STEP #4.

Rename /tmp/merged-stereo.wav (or /zap/merged-stereo.wav) to be “binauralSlates.wav” and copy into your homework factory directory (~/Library/Web/220a/binauralSlates.ck).