[Python-Dev] Implementation difference of audioop.lin2lin in Python2 and Python3

[Martin Panter]

On 13 December 2016 at 13:37, MRAB <python at mrabarnett.plus.com> wrote:
> On 2016-12-13 11:31, KH Luke Kim wrote:
>>
>> Hello,
>> recently there had been some issues in audioread and librosa that 3-byte
>> samples can be loaded in Python 3 but 2.
>>
>> The documentation says that the audioop.lin2lin function in Python 3
>> support 1-, 2-, 3-, 4-byte samples but only 1-, 2-, 4-byte samples in
>> Python 2.
>>
>> I wonder why 3-byte support is not implemented in Python 2. If there is
>> any previous thread or history regarding this issue, could you refer it
>> to me?
>>
> The Python docs say that support for 3-byte (24-bit) samples was added in
> Python 3.4, so anyone using a version before that one is out of luck!

The 3.4 reference leads you to What’s New, which leads to discussion
in the bug tracker:
https://docs.python.org/3/whatsnew/3.4.html#audioop
https://bugs.python.org/issue12866