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What’s Wrong with Digital Volume Controls?
https://www.soundstageultra.com/index.php/features-menu/general-interest-interviews-menu/311-what-s-wrong-with-digital-volume-controls
With a digital volume control, the peak signal level is reduced, but the underlying noise remains the same -- consequently, there is a reduction in dynamic range. The degree to which this loss of dynamic range is a problem depends on the inherent noise level of the DAC.
2.8-WSTEREO AUDIO POWER AMPLIFIER WITH …
https://www.ti.com/lit/gpn/TPA0152
2.8-WSTEREO AUDIO POWER AMPLIFIER WITH DIGITAL VOLUME CONTROL • Compatible With PC 99 Desktop Line-OutInto 10-kΩLoad • Compatible With PC 99 Portable Into 8-ΩLoad • Internal Gain Control, Which Eliminates External Gain-SettingResistors • Digital Volume Control From 20 dB to -40dB • 2.8-W/ChOutput Power Into a 3-ΩLoad • PC-BeepInput
Stereo Amplifier With Digital Volume Control | Hackaday
https://hackaday.com/2011/06/27/stereo-amplifier-with-digital-volume-control/
The volume control of this amp uses the DS1868 dual digital pot IC in place of the usual 10K pot providing 256 steps between zero and full volume. The DS1868 is controlled by a PIC μC with a 3 ...
1 W BTL audio amplifier with digital volume control
https://docs.rs-online.com/163e/0900766b804252fa.pdf
1 W BTL audio amplifier with digital volume control TDA8551 FUNCTIONAL DESCRIPTION The TDA8551; TDA8551T is a 1 W BTL audio power amplifier capable of delivering 1 W output power to an 8 Ω load at THD = 10% using a 5 V power supply. The gain of the amplifier can be set by the digital volume control. In the maximum volume setting the gain is 20 dB.
Portable Audio Amplifier with Volume Control
https://www.analog.com/media/en/reference-design-documentation/reference-designs/CN0226.pdf
mono audio amplifier with volume control, glitch reduction, and a 3 W Class-D output driver. The volume is controlled manually with a simple push-button interface to a 64-position digital potentiometer. An automatic store function retains the last volume setting, and an LED provides visual information of the maximum/minimum volume.
Digital volume controls – PS Audio
https://www.psaudio.com/pauls-posts/digital-volume-controls/
Digital volume controls are the same in this regard, but a whole other story. They add nothing to the signal path: instead they rearrange the digital numbers to achieve a lower volume. This is simple to understand if you remember that each loudness level in a PCM digital system is based on a number – that number representing the level of the output signal – with …
Audio Gain Control Using Digital Potentio | Maxim …
https://www.maximintegrated.com/en/design/technical-documents/tutorials/1/1828.html
Abstract: Digital potentiometers (pots) offer advantages for audio volume (gain) control applications and can replace bulky mechanical pots, especially in handheld portable devices such as MP3 players, PDAs, cell phones, mobile Internet devices, or stereo AM/FM radios. This document describes the types of digital pots available for audio control such as logarithmic …
LM386 Stereo Amplifier with Digital Volume Control - …
https://www.youtube.com/watch?v=O38PZX__r4g
This project describes how to use MAXIM's DS1868 digital potentiometer with a PIC microcontroller to make a digital volume control for audio amplifiers. Visi...
Control volume with DAC or Preamp? - High-End Audio ...
https://forum.audiogon.com/discussions/control-volume-with-dac-or-preamp
Best quality least distortion and coloration, and best dynamic swing, dac direct to poweramp using the dac as the volume control will be the best. Without any debate. As the PS audio’s dac output stage will as good if not better than the Benchmark preamp and has up to 3volts output at full, which is more than enough.
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