

Why 64 bits?Most audio is recorded with 16 bits resolution. WinAudioMLS uses in the standard mode 32bit floating
point variables to store each sample. From a first look this headroom seems to be more than sufficient.
Floating point variables have a dynamic range of more than 200dB which is far much more than any audio format. You can easily check this effect. If you analyze an ideal 16bit sine file with a 1024 points FFT,
you get a THD+N close to the theoretical value (97dB). The input signal is a file with an ideal 1kHz sinus sampled with 16bit. It can be easily seen that the noise introduced by the 32bit FFT at 8192 exceeds the quantization noise and therefore degrades the THD+N measurement by 6dB. FFT size 1024 32bit FFT THD+N 96dBFFT size 1024 64bit FFT THD+N 96dBFFT size 8192 32bit FFT THD+N 90dBFFT size 8192 64bit FFT THD+N 97dB 
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