Harald Bode Klangumwandler
A module of modules: 3 dome filters, 4 ring modulators and some summing/differencing amps (mixers). Each additional slave requires an additional dome filter, pa...
TL082 Gobal chips
This circuit provides either latched switching or timed switching. U1A and U1B provide audio ampliftcation from the microphone, U2 is a retriggerable monostable...
Suppliers of Pro-Audio Equipment
Graphic equalisers are made of 15 or 30 band-pass filters, one for each 1/3 octave frequency. Conventional equaliser designs use standard discrete components to...
1996 GL1500 modulators interfering with audio
A power filter is a device you put ahead of something like a GPS and MP3 player and or radar detector that you have run into the Aux Circuit. But these things u...
Soundtraxx Sierra Tips
This page describes the installation and use of a Soundtraxx Sierra sound system. The Sierra worked quite well and was reasonably priced, but time marches on. A...
Bachmann Sound Tips
This page is a revised version of the original submission of an article entitled "Better Bachmann Sound For Under A Buck" published in the Feb. 1998 issue of Ga...
Intercom
This intercom box takes input from any 2-way radio (FRS, GMRS, etc), cell phone, and a stereo audio source and amplifies them for listening via a headset in you...
Case Modification - Stereo VU Meter
This is a quick how-to guide for making a stereo VU meter using the LM3915/LM3916. The LM 3916 is an integrated circuit (IC) that takes analog voltage levels an...
A simple passive logarithmic VU-meter
A VU-meter is a very common instrument usually installed on audio Hi-Fi amplifiers and is used to show the instantaneous power provided to the speakers. It is u...
The Technology of the Tube Screamer
The Tube Screamer series of distortion/overdrive boxes from Ibanez has a reputation that has led them to pass into musical urban myth. Helped along with Stevie ...
Simple Easy Parametric and Graphic EQs Plus Peaks and Notches
Everyone is familiar with the sound of a wah pedal. This is a resonant peak in the signal that can get moved around. Not so familiar is a notch, or a sudden red...
A DC Fault Protection Circuit for Audio Amplifiers
The standard Class AB audio power amplifier allows for direct coupling of the output of the amplifier to speakers. This is very good in that no capacitors or tr...
VU meter Dave Circuit Data 1
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Cook Your Own Distortion
Later in the sixties, the first distortion effect boxes were made to simulate the sound of razored cones and overdriven amps. Now, most amps have a distortion c...
Strange EQ plot PULTEC build
I just finished a Drip Pultec V2. Checking the EQ curves in spectrafoo I noticed an anomaly. The 20, 60 and 100hz curves appear as expected but the 30.....
Buffer Issues
Hi I am currently working through the prototype of my first guitar pedal. I am having issues with the input buffer, and I would like someone to look.....
Adding VU Meter to Dantimax thatmic preamp
Hi all, i`ve recently bought the dantimax thatmic pre amp and i was wondering if anyone could point me in the right direction to install a vu meter.....
Suggestions for mic pre schematics
Hey all I`ve got a paper this year in (active) electronics. I`m in the second year of a bachelor in audio production. Our main project will be to.....
Microphone Preamp Buffer Help
Hi I have decided to build this mic preamp and tone control circuit which was posted on a another site. The Eq section is the same one used in the.....
Otari MX-5050 BII Problem - Not for the faint of heart!
Hey guys, apologies in advance for the wall of text, but this is a diagnostic problem and I felt I should include as much info as possible for those.....