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DuBaron Freeware
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Digital Equalizer

Superb Digital equalizing with HiFi (CD) Quality! Improved version available now!
  • Live equalizing as well as play from file and save-to-file functions.
  • Play, listen, setup & convert!
  • For Real-time processing as well as for off-line converting!
  • Simultaneous output to file&wave device.
And...... this is FREEWARE!

Order Pro version
Technical info

Now available: The Final release of the Full Working 44100 Hz Real Time Equalizer for FREE!

Minimal System Requirements:
P150(133?)  or comparable/better up to P333/400; full duplex 22.050/44100 Hz Stereo 16 bits Soundcard, music source. P200+ recommended (22 KHz stereo).

Equaliser enables you to select input (wave-device or 22/44KHz stereo *.WAV file), and
outputs to file and wave-device, even simultaniously!

if you order DuBaron Equalizer Pro before April 30. 1999, you'll get the full working version (with noise filter, presets and others) for only $30 (25 euro dollar) instead of $89 (euro 75,=).(per e-mail; for CD add $6 for delivery).

Full working 44.1 KHz version of DuBaron Digital Equalizer 2.0:
Click here to download the zip of the shareware DDE.
DuBaron Digital Equalizer technical info: System requirement:
P150-P400 or comparable/better;
22KHz/44KHz Stereo Full Duplex SoundCard
  • 20 band digital equalizer
  • Capable of switching between mono/stereo and 22/44KHz
  • Signal/Noise: >62 dB (soundcard noise not calculated)
  • Effective frequency alteration per band:-60 dB to +6 dB
  • Master Volume: -60 dB to + 6 dB; auto adjust (avoids clipping)
  • Effective latency: 360 - 900 ms
  • Sample buffer size: 512 Samples (2048 bytes)
  • FFT buffer size: 1024 point
  • Input: Live recording or play from file
  • Outputs to file and/or wave device
Estimated processor requirements:
mono stereo
22.050 Hz P 150 (133) P 200*
44.100 Hz P 266 P 333 (400)
*P 200 = +: Cyrix PR200MX (166); Intel P166MMX; Intel P200; AMD 200; Cyrix P200+

Note that prestations depend on other hardware (like sound cards) as well.
a real SB seems to be slow; a PCI soundcard costs little overhead! Aztech chip sets are real fine.
10 ns DIMM is preferable above 60-70 ns EDO ram (15-20% advantage for DIMM)
When using mono settings, your soundcard is still used stereo. Only the left input signal is taken, output is send to both channels.


How to use DuBaron Digital Equalizer:

No hard settings, just be aware of the following things:

  • Your processor speed should do. Check the above table.  If you notice your PC can't handle, immediately stop the equalizer and try different settings. A buffer overflow can cause serious trouble.
  • For live function do:
  • Connect your soundcard line-in and line-out. For example: connect your computer to your amplifier as if it was a tape recorder.
  • Select 'Line-In' at your mixer recording properties.
  • Select 'Wave-Out' at your mixer playback properties.
  • Adjust recording volume to a low level (only a little distortion might sound awful)
  • Execute the digital equalizer and check your hardware properties (mono/stereo; 22/44KHz)
  • Press the 'Start' button (alt-S)
  • Play your music source.
  • For in/output from file do:
  • Choose 'Advanced Setup'
  • Select desired file(s) for playing and/or record (note that simultaneous output to  file and to wave device is possible, for input device you've got to choose between file and wave-in)
  • Notice that the wave-format of the file shouls correspond to the equalizer settings (i.e. only STEREO 44K1 or 22K05 supported, even with 'mono' settings.
  • To convert, first listen to the results while playing to wave device, take your time to get set the right settings, and then select 'output to file' and let it run.
  • If your computer isn't just as fast enough, you could set-up live using mono setting, and when converting switch to stereo setting.
  • Note that mono/stereo switching can be done on the fly, so don't switch while converting unless you want to.
  • Note that when using 'mono' setting wave(and file)-in and output remains stereo!
  • In fact, that's it.
  • You'll be able to adjust all frequency components, from entirely mute to +6 dB for each band.
About the program:
The yellow curve displays your frequency adjustment. If you move over with the mouse, you can check the exact adjustment of each frequency.

use this to 'connect' your slides.

  • no coherence: move each single slide
  • '2*3 slides 0 steps coherence': move 7 slides the same time (the one moved plus the three slides left&right nex to it).
  • 'all slides 2 steps coherence'.. if the difference between two slides becomes greater than 2, the slide next to will be adjusted. So if you move one slide, the rest will follow a bit.
Advanced setup:
'Automatic master volume adjust': when output signal procudes 'clipping', the master volume is automatically adjusted. We recommend to always leave this setting on, since clipping sounds horrible.

'Sample Quant. Noise cut-off': reduces cumulous effects of the 'sample noise' i.e. the noise produced because even a 16-bit sample is not a linear function (inherent to ADC converting). Recommended to leave on, since it has only a positive effect on the output signal (although normal ears can't tell the difference). In fact, the checkbox shouldn't even be there.

Just try and play with this to understand. We haven't found a better way to make the control more practical, and since a single mouse pointer is absolutely not comparable with two human hands containing 5 fingers each... you'll have to do with this.

Trouble Shooting:
If you encounter problems:

Some ticking in the first seconds after you pressed 'start' is normal...

If ticking continues: press 'stop' immediately. Check your processor capacity. Eventually restart digital equalizer.

If your wave-device get's stuck ('bad format') eventually restart equaliser to re-initialise all settings. (can happen when opening faultly assigned wav-in files (i.e. wave-file is not the correct format (44 or 22Khz stereo). Make sure the checkbox is correctly  checked before playing the .wav file.

If all remains silent:
-check your mixer & connectors
-check if your card is full duplex
-if you installed direct-x: check (some versions/sound cards) the 'full duplex setting). Direct-x might disturb normal wave functionality.

If there are 'gaps' in the sound:
-when live: immediately stop digital equalizer. Your processor is not fast enough. Try other settings (22 kHz).;
-when playing from file and/or converting no data will get lost even if output doesn't sound continuesly.

Pressing start/stop button gives no response: Your PC is overloaded. Please restart the digital equalizer.
Hint : do not press the start/stop button to fast after each other. Since it controls a thread, your os might get confused with all troubles there. If the equalizer does not react: please restart  the equalizer.

If you can't get digital equalizer working: contact us, write down your type of soundcard, processor and other things that might be of influence, and we'll see if we can solve these problems in the next version.

This version of DuBaron Digital Equalizer is fully functional.
You are licensed to use this program without limitations.
Since this is freeware, you may give it away.
However: you may NOT sell this or redistribute it on commercial (share)(warez) CD's or whatever.
The contents of the original zip file (including this html) should be respected.

About DuBaron Equalizer Pro:

-Final release of version 2.0 medio March 1999: released!
-Save-To-File and Play-From-File functionality: implemented!
-Save and restore Presets: not yet implemented!
-Noise Filter (release 2.1?): yet not implemented!

Order DuBaron Digital Equalizer Pro before April 30. 1999 to profit from our introduction offer:
$59 off! pay only $30 instead of $89! for delivery on CD add $6 p&p.
mail to dubaron@telekabel.nl to order. (please submit your name, company(optional), country).
Ordering per e-mail includes free upgrades until 2000.

February 7. 1999 DuBaron ArTeeFicial Soft Productions
dubaron - your partner in free solutions
Frontend programming (C) 1998-2005 by René for dubaron.com