wave.readframes() (or conversion?)

[andrea valle]

On 26 Sep 2004, at 08:31, Tim Roberts wrote:

> You get back a buffer of bytes.  You can use the array() module to 
> convert
> it to a list of integers.


Thanks a lot, I'll try.


> What version of Python are you using??  On my Win32 Python 2.3, 
> writeframes
> accepts only strings, and only after you have set the frame rate, 
> sample
> size, and number of channels.

I'm using MacPython hardwired (damn') with Numerical package (Numeric 
22.0) in MacOSX 10.3.5. It's Python2.3.
I surely have to set wave params, but then I pass .writeframes an array 
converted to list (array.tolist()). Works for me (luckily).

Here a minimum example:

from Numeric import *
from RandomArray import *

class SoundFile:
	def  __init__(self, signal):
		self.file = wave.open('/test.wav', 'w')
		self.signal = signal
		self.sr = 44100
	
	def write(self):
		print "\nwriting to wavefile"
		self.file.setparams((1, 2, self.sr, 6, 'NONE', 'noncompressed'))
		self.file.writeframes(self.signal.tolist())
		print "done\n"

signal = uniform(-1, 1, 44100)
f = SoundFile(signal)
f.write()

Best

-a-


Andrea Valle
Laboratorio multimediale "G. Quazza"
Facoltà di Scienze della Formazione
Università degli Studi di Torino
andrea.valle at unito.it
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