Go Back   Home > Forums > > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Twisted Pear Superior quality electronic kits

Thread Tools Search this Thread
Old 20th February 2014, 05:47 PM   #1
Stéphane B is offline Stéphane B  France
diyAudio Member
Join Date: Nov 2007
Default How to link several BuffaloIII volume control ?

Hi there everyone,

So, I need your help with something that seems was not discussed before here as it's bit of a particular case to say the least.

I'm setting up a surround system in which each monitor (2 way SEOS12 + AE TD12M) has it's own stereo Buffalo III (se), each driver powered by an NCore amplifier. Loudspeaker crossovers will be managed by a dedicated computer with RME AES I/O cards (one AES pair per monitor) running IR's done with RePhase (so XO's + amplitude and phase correction).

I will offset each driver level and delay inside the host but I want to take the advantage and convenience of the high quality digital volume control built-in the ESS9018 DAC. If I recall correctly it's done over 32bit, the DSP being 48bit.

Now what I want to do as said in the title of this thread is to control volume on several Buffalo III at the same time.

To look at it another way, what I must do is control simultaneously and remotely several motorized pots, as volume control on the Buffalo DAC is done via a potmeter. (ADC connector)

What I've think about so far is controlling the motorized potentiometers by programming an Arduino microcontroller and buffer the output to the "x" number of pots I need to control. I don't think I need one microcontroller per motorpot, do I ? I also want to be able to program some reference listening levels so a microcontroller seems to be the only way to go.

Other thoughts : in place of a motorized potmeter which may be imprecise (but again, I will offset each driver level on the host computer) or has tracking inconsictancies over time, what do you think of using instead a resistor network like the Joshua Tree ? Such device has 128 steps (can it work with 0.5dB steps ?), can be remote controllable and has a mute function.

Not as easy as wiring a motor pot but what I want to do is far from easy !

I would really appreciate any help or ideas on that particular matter !

  Reply With Quote
Old 20th February 2014, 07:54 PM   #2
LeonvB is offline LeonvB  Netherlands
diyAudio Member
Join Date: May 2010
Location: Netherlands
Just control the volume of the BIII(SE)s with a microcontroller. You just need a controller with multiple I2C busses to hook up all of the boards and set the volume by software.
  Reply With Quote


How to link several BuffaloIII volume control ?Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
WTB: BuffaloIII valleyman Swap Meet 0 9th March 2013 09:31 PM
Volume control on DVD player remote. Lose resolution at low volume? Circlotron Digital Source 2 10th June 2011 07:20 PM
Replacing broken volume control with digital volume control Gunawan W Solid State 19 15th December 2010 10:46 AM
remote control motorised control for volume pot/knob CharlesY Parts 0 25th July 2005 11:12 AM
Link to a guy who have made some digital volume control tests sonnya Solid State 5 15th May 2002 11:12 PM

New To Site? Need Help?

All times are GMT. The time now is 12:04 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio