My Math Forum How digital volume work?

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 April 12th, 2018, 04:12 AM #1 Banned Camp   Joined: Nov 2017 From: india Posts: 204 Thanks: 2 How digital volume work? Hello how digital volume work, like in analog there is potentiometer. how digital volume work??
 April 13th, 2018, 04:31 AM #2 Senior Member   Joined: Apr 2014 From: UK Posts: 895 Thanks: 328 The volume control is not a potentiometer, it is usually a rotary encoder, basically you get pulses from it when it turns, google them for more information. A controller of some sort reads the pulses and counts up/down then multiplies the volume level by the outgoing sound.
 April 13th, 2018, 08:57 AM #3 Banned Camp   Joined: Nov 2017 From: india Posts: 204 Thanks: 2 Please tell more how it work; I am not getting it. Last edited by skipjack; April 16th, 2018 at 07:30 AM.
 April 16th, 2018, 01:05 AM #4 Senior Member   Joined: Apr 2014 From: UK Posts: 895 Thanks: 328 The sound is represented as numbers which are converted to sound. Before that conversion, we can multiply them by another number, this gives us control of the volume digitally.
 April 16th, 2018, 07:44 PM #5 Banned Camp   Joined: Nov 2017 From: india Posts: 204 Thanks: 2 the sound is pwm?
 April 17th, 2018, 12:10 AM #6 Senior Member   Joined: Apr 2014 From: UK Posts: 895 Thanks: 328 No, it's an analogue waveform. https://www.sfu.ca/~gotfrit/ZAP_Sept...d/digital.html
 April 17th, 2018, 01:25 AM #7 Banned Camp   Joined: Nov 2017 From: india Posts: 204 Thanks: 2 which ic do this work?
 April 18th, 2018, 03:54 AM #8 Senior Member   Joined: Apr 2014 From: UK Posts: 895 Thanks: 328 There are many ways to do it, it will depend on what hardware and software you have. Of course, you could also use a digitally controlled potentiometer
 April 18th, 2018, 05:09 AM #9 Banned Camp   Joined: Nov 2017 From: india Posts: 204 Thanks: 2 can we do this in fpga?
 April 18th, 2018, 07:44 AM #10 Senior Member   Joined: Apr 2014 From: UK Posts: 895 Thanks: 328 Absolutely

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