10-05-2020, 04:17 PM
(This post was last modified: 10-05-2020, 04:23 PM by Mike Watterson.)
Class D can now be better than Class AB or Class B for audio. Class A is relatively easy 
If money is no object then:
Physical pot to set input gain, driven by a motor for remote control. (I have a JVC HiFi with such a nice volume control, mute is pretty to watch)
Sample at 192 kHz to reduce complexity and improve impulse response of the front end anti-aliasing filter.
An eInk display for the graphic equaliser response curve to suit room/speaker combo. Set by knobs / touch as desired. Stays as is with no power. Used also to input curves for speakers.
Four class D amps per channel (up to 12 channels) for up to 4 speakers per enclosure.
Input room dimensions, speaker locations and quantity etc.
An option to measure each speaker / enclosure using a reference microphone at the listening position.
Input: Mono, Stereo, Binaural, all the types of four channel and five channel by analogue line level. Phono inputs for crystal, cerammic, moving coil, moving iron etc. Tape head inputs. Optical & RCA & HDMI loop/in for digital audio. WiFi and BlueTooth RF in. FM Tuner in because it's free in the WiFi/BT chip.
Output: separate mono / stereo / binaural for headphones as well as main output.
DSP by an FPGA or even an ARM can manage Audio. All the usual buttons and knobs feed the DSP for Bass, Treble, Loudness modes, rumble, hum notches. But also crack and scratch filters for discs.
Standalone: Add your own speakers, optionally with crossovers removed.
Edit:
The PSU, box, displays and knobs for a decent power class D amp with DSP might cost more than the ADC, DSP and amps!
If money is no object then:
Physical pot to set input gain, driven by a motor for remote control. (I have a JVC HiFi with such a nice volume control, mute is pretty to watch)
Sample at 192 kHz to reduce complexity and improve impulse response of the front end anti-aliasing filter.
An eInk display for the graphic equaliser response curve to suit room/speaker combo. Set by knobs / touch as desired. Stays as is with no power. Used also to input curves for speakers.
Four class D amps per channel (up to 12 channels) for up to 4 speakers per enclosure.
Input room dimensions, speaker locations and quantity etc.
An option to measure each speaker / enclosure using a reference microphone at the listening position.
Input: Mono, Stereo, Binaural, all the types of four channel and five channel by analogue line level. Phono inputs for crystal, cerammic, moving coil, moving iron etc. Tape head inputs. Optical & RCA & HDMI loop/in for digital audio. WiFi and BlueTooth RF in. FM Tuner in because it's free in the WiFi/BT chip.
Output: separate mono / stereo / binaural for headphones as well as main output.
DSP by an FPGA or even an ARM can manage Audio. All the usual buttons and knobs feed the DSP for Bass, Treble, Loudness modes, rumble, hum notches. But also crack and scratch filters for discs.
Standalone: Add your own speakers, optionally with crossovers removed.
Edit:
The PSU, box, displays and knobs for a decent power class D amp with DSP might cost more than the ADC, DSP and amps!
