Audio overlap loop: Difference between revisions

=={{header|Nim}}==

{{trans|Go}}

As in Go version, we use Sox "play" command.

<lang Nim>import osproc, strutils

proc getValue[T: int | float](msg: string; minval, maxval: T): T =

while true:

stdout.write msg

stdout.flushFile()

try:

result = when T is int: stdin.readLine.strip().parseInt()

else: stdin.readLine.strip().parseFloat()

if result notin minval..maxval:

echo "Invalid value"

else:

return

except ValueError:

echo "Error: invalid value."

except EOFError:

echo()

quit "Quitting.", QuitFailure

const FileName = "loop.wav"

let reps = getValue("Enter number of repetitions (1 to 6): ", 1, 6)

let delay = getValue("Enter delay between repetitions in microseconds (50 to 500): ", 50, 500)

let decay = getValue("Enter decay between repetitions (0.2 to 0.9): ", 0.2, 0.9)

var args = @[FileName, "echo", "0.8", "0.7"]

var decay2 = 1.0

for i in 1..reps:

decay2 *= decay

args.add $(i * delay)

args.add $decay2

echo execProcess("play", args = args, options = {poStdErrToStdOut, poUsePath})</lang>