[PD] New user question: How to create simple audio delay?

[Benjamin Freidlin]

Thanks for the extra explanation. I am guessing dac is digital audio converter or something like that? i am not from the audio world unfortunately, in fact i'm from the real-time 3d dev world so a lot of this stuff is new to me. 

but again thanks for the hand holding. if i still have trouble after trying to modify the sample and reading the docs, i'll post back.

---------- Original Message ----------------------------------
From: "matthew jones" <M.Jones at signal.qinetiq.com>
Date:  Wed, 15 Oct 2003 15:35:36 +0100

I'm sure you'll get a few other replies but I thought I'd send it anyways...
ADC stands for Analogue-to-Digital Converter, the circuitry in your sound
card that every few nanoseconds looks at the voltage it's being sent via the
line-in socket (yes, all audio signals will be in the form of a fluctuating
voltage in the Analogue domain) which is clearly an analogue signal, and
sends a corresponding number to the computer.  The higher the number the
higher the voltage at that particular instant. the output number is clearly
a digital number, since there is finite precision in this circuitry.

Hence this is called sampling - every N nanoseconds it samples the input to
find out its value, and sends a corresponding number, called a 'sample'.
you then get a long series of numbers into the computer, which you can save
to hard disc in the form of a wav file, or PD can read them via the [adc~]
object.  So from the outlet of this object comes a fast stream of numbers
between 0 and 1 (1 corresponding to the maximum input voltage on your
soundcard), which you can then stream to a [dac~] object for instance... can
you guess what this stands for? (ha, joke.  me? patronising??!)

the [delwrite~] object is just being told to send out the sample that was
read M miliseconds ago.

sorry if all this is way below your level, but it's hard to know where to
start sometimes.
have fun with pd! see what else can be done!

matt