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Divide and Rule the Audio Band for multiple band , multiple DAC ADC output

Mustafa Umut Sarac

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Mar 2, 2025
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Hello from Istanbul , I thought at the toilet :) if we devide audio frequency band in to parts and each part processed for adc dac , we can create more data for to use. I asked chat gpt , how many megabytes per second a highest resolution - 1 bit or 32 bit - adc or dac uses , and it wrote to me only few megabytes. I looked in to LTO Tapes and they can use 300 mb per second . We can increase data flow and We can use this idea , I think.
I am thinking loud , what would happen if we divide sound spectrum in to two and record two by two reel to reel tapes and than play two ?

Mustafa Umut Sarac
Istanbul
 
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I don't think you'll gain anything. There is a concept known as superposition which allows soundwaves (or electrical waves or digital data) at different frequencies to exist simultaneously. If an amplifier works from 20-20kHz it can amplify the whole orchestra at once just as easy as it can amplify a single frequency. With speakers it's hard to make a driver that works well for the whole audio range so we often have a woofer and tweeter, and sometimes a midrange and/or a subwoofer, etc. But still, each driver puts-out multiple frequencies simultaneously.

Lossy compression (MP3, etc.) uses FFT to divide the audio into frequency bands. Some of the audio that can't be heard anyway is thrown away and that helps to make a smaller file.
 
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