Quote:
Originally Posted by schwa
Because REAPER peaks are always accurate. The peak value during any time period is the maximum (absolute) sample value during that period. If you skip samples, you could skip the maximum sample value. For example imagine a 10 minute recording that is silent except for one gunshot every minute. If the peaks building skipped samples, the peaks display might show anywhere between zero and 10 gunshots.
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I agree you are right for the higher frequency content of the audio events but that frequency domain would also get displayed in subsequent refining passes .
What I am proposing is getting a fast waveform display refining it from low frequency content to high frequency content as follows:
For a basic recording quality of 44100 hz one milisecond gets 44.1 samples
That means that physically skipping every other 1000 samples every milisecond gets a 44.1 samples of low frequency samples.
Even your audio event example lasts for 5 miliseconds (I searched the info) so even that would be displayed as a high amplitude low frequency (0hz-44hz domain) blob of 5 x 44.1 samples.
So skipping every 1000 samples at first and progresively refining would work in a useful way.
The first pass skipping every other 1000 samples would cover 0hz-44.1hz frequency domain.
The second pass would also skip every other 1000 samples but starting from the 500th sample counting from the begining of the recording and this second pass would cover 44.1hz-88.2hz domain.(and complement the 0hz-44.1hz domain)
The third pass starting from the 250th sample counting from the begining would cover
172.4hz-344.8hz domain ((and complement the 0hz-44.1hz domain + 44.1hz-88.2hz domain)
And so forth
The entire very long recording clip would quickly be filled with interpolated low frequency waveform graphical data obtained from skipping every other 1000 samples (or the user adjusted ammount) while continously refining it from the frequency ground up with each skipping but cumulative pass .
Being able to see high amplitute low frequency waveform data quickly all accross a 24 hours audio recording file is good .
One could see what is happening in the last 6 hours of the big file quickly not having to wait 4 minutes