Specify number of bits sound card uses to represent samples
Note: You cannot use the legacy interface on 64-bit MATLAB®. See Working with the Session-Based Interface to acquire and generate data on a 64-bit MATLAB.
BitsPerSample can be 8, 16, or any value between 17 and 32. The specified number of bits determines the number of unique values a sample can take on. For example, if BitsPerSample is 8, the sound card represents each sample with 8 bits. This means that each sample is represented by a number from 0 through 255. If BitsPerSample is 16, the sound card represents each sample with 16 bits. This means that each sample is represented by a number from 0 through 65,535.
For older Sound Blaster cards configured for full duplex operation, you might not be able to set BitsPerSample to 16 bits for both the analog input and analog output subsystems. Instead, you need to set one subsystem for 8 bits, and the other subsystem for 16 bits.
AI, AO, common to all channels
Read-only when running