Files and formats of AudioChain
The format of the recorded audio files is a custom raw format. The file begins with a 16 byte header followed by the pcm signal. The header defines the encoding of the pcm and can be read by a hex editor. The header has the following structure.
Example: 'PCMS0116BE044100'. This header can be split into five sections.
- Section 1: 4 alpha characters: PCMS (PCM-signed), PCMU (PCM-unsigned), ALAW, ULAW. Usually this will always be PCMS.
- Section 2: 2 numbers: The channel count: 01 Mono, 02 Stereo
- Section 3: 2 numbers: Sample size in bits (in this example there are 16 bits per sample)
- Section 4: 2 alpha characters: BE for big endian, LE for little endian
- Section 5: 6 numbers: The sample or frame rate (in this example 044100 means 44.1kHz)
Alternatively you can take a look at the audio project settings dialog. There are three of these settings displayed: Sample Rate, Sample Size In Bits and the Endianess. The channel count depends on the recorded file. So have a look at the recording audio device's combobox for file selection. Make a mouse over on it to let the tooltip information pop up. There will come up a descriptive information of the file. Directly following the filename is either the letter M or S, indicating mono (1 channel) or stereo (2 channels).
With this information you will be able to import the audio files into other sound editors, for example audacity has a raw import.