To subtract one audio wave from another, you can use a process called audio waveform subtraction. This technique involves manipulating the amplitude values of the audio samples to achieve the desired result. Here's a general outline of the steps involved:
Load the audio waves: Start by loading the two audio waveforms that you want to subtract. You'll have a source waveform (the one you want to subtract from) and a subtractor waveform (the one you want to subtract).
Ensure compatibility: Make sure that the two waveforms have the same format and sampling rate. If they differ, you may need to resample or convert them to a compatible format.
Align the waveforms: If the two waveforms have different starting points or lengths, you'll need to align them properly. This may involve trimming or padding one waveform to match the duration of the other.
Perform subtraction: Subtract the sample values of the subtractor waveform from the corresponding sample values of the source waveform. This can be done by subtracting the amplitude values of each sample at a given time point.
Resulting waveform = Source waveform - Subtractor waveform
Note: Ensure that the subtraction is performed on a sample-by-sample basis, maintaining the correct alignment.
Adjust for any negative values: After subtraction, some resulting sample values may become negative. Depending on the audio representation, you may need to adjust these negative values. For example, in a signed integer representation, you can clip the negative values to zero or apply some normalization technique.
Save or process the resulting waveform: Once the subtraction is complete, you can save the resulting waveform to a file or continue processing it further as needed.
It's worth mentioning that subtracting one waveform from another may not always result in the desired outcome, especially if the waveforms are complex and contain various frequency components. Additionally, the quality of the subtraction may depend on factors such as the signal-to-noise ratio, alignment accuracy, and the characteristics of the audio signals involved.