Read and write .wav sound files with Ruby
Read/Write Common Formats
PCM Integer – 8, 16, 24, or 32 bits per sample
PCM Float – 32 or 64 bits per sample
Any number of channels
Seamless ConversionsConvert back and forth between any format the gem supports. Read from an 8-bit mono file as if it were 16-bit stereo. Generate floating point samples, and write them to a PCM file.
Query MetadataGet the sample format, sample rate, number of channels, number of sample frames, and so forth from a Wave file, even if it’s in a format this gem can’t read or write.
Pure RubyEasy to install, no need to compile a separate extension in order to use it.
Let’s say you have these three Wave files:
This program will concatenate them into one file called
include WaveFile # To avoid prefixing classes with "WaveFile::"
FILES_TO_APPEND = [ "one.wav" , "two.wav" , "three.wav" ]
OUTPUT_FORMAT = Format . new ( :stereo , :pcm_16 , 44100 )
Writer . new ( "one_two_three.wav" , OUTPUT_FORMAT ) do | writer |
FILES_TO_APPEND . each do | file_name |
Reader . new ( file_name ). each_buffer do | buffer |
writer . write ( buffer )
Intrigued? Check out
Don’t have any idea what this code means? Check out the
Getting Started guide.
First, install the WaveFile gem from rubygems.org:
gem install wavefile
...and include it in your Ruby program:
Note: It’s recommended that you use a Ruby version manager such as
rvm or rbenv. But if using the system Ruby that comes pre-installed on MacOS, you should used
sudo gem install wavefile. Otherwise you might run into a file permission error.