This package provides a simple and unified API to read and write sound-files to and from numpy arrays.
Documentation
API
sndread
reads all the samples (or a fragment) from a soundfile and returns a tuplet (data, samplerate)
Data will always be as a numpy.float64, between -1 and 1, independently of bit-rate
sndread_chunked
reads chunks of frames, avoiding the allocation of all the samples in memory
sndinfo
returns SndInfo, a namedtuple with all the information of the sound-file
sndwrite
writes the samples.
samples need to be a numpy.float64 array with data between -1 and 1
sndwrite_chunked
allows you to write to the file as samples become available
resample
Resample a numpy array to a new samplerate
Examples
# Normalize and save as flac
from sndfileio import sndread, sndwrite
samples, sr = sndread("in.wav")
maxvalue = max(samples.max(), -samples.min())
samples *= 1/maxvalue
sndwrite(samples, sr, "out.flac")# Process a file in chunks
from sndfileio import *
from sndfileio.dsp import
with sndwrite_chunked(44100, "out.flac") as writer:
for buf in sndread_chunked("in.flac"):
# do some processing, like changing the gain
buf *= 0.5
writer.write(buf)Installation
pip install sndfileioExternal dependencies
libsndfile (Debian/Ubuntu: apt install libsndfile1-dev)
License
See the LICENSE file for license rights and limitations (MIT).
1 maintainer
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