[Tutor] wave.readframes() (or conversion?)

[andrea valle]

Thanks a lot, I will try as soon as I can.
Best

-a-

On 25 Sep 2004, at 03:26, Kent Johnson wrote:

> You can use the struct module to do this. You will have to find out 
> whether the wave data is stored in big-endian or little-endian format.
>
> >>> import struct
> >>> hex(32000)
> '0x7d00'
> >>> d='\x7d\x00\x00\x00'
> >>> struct.unpack('<hh', d)
> (125, 0)
> >>> struct.unpack('>hh', d)
> (32000, 0)
>
> Kent
>
> At 12:42 PM 9/23/2004 +0200, andrea valle wrote:
>> Hi to all,
>> I'm using wave module with success. I'm writing data to wave file. 
>> Typically I create a list of values (data) and pass it to 
>> .writeframes(data) methods.
>>
>> a = wave.open("/test.wav", "w")
>> a.writeframes([32000, 0])
>>
>> This sets the first sample to 32000 and the 2nd to 0
>>
>> But when I use the .readframes() method I don't know exactly what
>> values I extract from the open wave.
>>
>> >>> a = wave.open("/test.wav", "r")
>> >>> a.readframes(1)
>> '\x00\x00'
>>
>> How do I convert it to an integer? I'd like to have it like 32000 or 
>> 0, so to make some maths on it.
>>
>> Thanks a lot
>>
>> -a-
>>
>> Andrea Valle
>> Laboratorio multimediale "G. Quazza"
>> Facoltà di Scienze della Formazione
>> Università degli Studi di Torino
>> andrea.valle at unito.it
>> _______________________________________________
>> Tutor maillist  -  Tutor at python.org
>> http://mail.python.org/mailman/listinfo/tutor
>
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> http://mail.python.org/mailman/listinfo/tutor
>
Andrea Valle
Laboratorio multimediale "G. Quazza"
Facoltà di Scienze della Formazione
Università degli Studi di Torino
andrea.valle at unito.it