Contain More Than 1000 Schematics

Miscellaneous Audio

3 Transistor Audio Amp (50 milliwatt)

3-Band equalizer

555 Tone Generator (8 Ohm Speaker)

Active Sub-Woofer and Controller

Analog VU meter

Audio graphic equaliser

Audio line isolator

Audio notch filer

Audio Signal Source

Automatic loudness control

Balanced Line Driver & Receiver

Base / treble control circuit using LM1036N

Bridging Adapter For Power Amplifiers

Code practice oscillator

Cuckoo sound generator

Digital Delay Unit For Surround Sound

Digital noise generator (PDF)

Digital volume control

Direct Injection Box for Recording & PA Systems

Doorphone intercom

Dual Voltage Controlled Filter w/Modulator

Dual Voltage Controlled Oscillator w/Modulator

Dynamic microphone to electret microphone input

Electronic attenuator

Electronic canary

Electronic siren

Electronic whistle

Fast Audio Peak Limiter

FET audio mixer

Improved PL tone decoder

Intercom preamp

Linkwitz Cosine Burst Generator

Loudspeaker Protection and Muting

Low Frequency Sinewave Generator

Low Noise Balanced Microphone Preamp

Low Noise Microphone Preamplifier

Low Power Op-Amp - Audio Amp (Intercom)

Magnetic cartridge amplifier

Microphone mixer

Microphone phantom power supply

Minimalist Discrete Hi-Fi Preamp

MS Stereo Decoder

MS Stereo Microphone

Noise generator

Paradoxical Sound Syntheizer

Parametric And Sub-Woofer Equaliser

Peak reading audio level meter

Power Amplifier Clipping Indicator

RIAA Equalized Stereo Phono Preamp

Signal Detecting Auto Power-On Unit

Simple amplifier

Simple Surround Sound Decoder

Simplest Ever Amplifier Bridging

Sine wave generator

Sound level meter

Speaker Microphone Circuit

Speaker signals to line level inputs

Speech recorded using ISD2560

Stereo line driver

Stereo Width Controllers

Subwoofer Equaliser

Surround Sound Decoder Mk2

Three channel audio spectrum analyzer

tw1o-tone siren

Underwater microphone

Use amplifier phono input as line level input

Variable Amplifier Impedance

Very loud beeper (PDF)

Voltage controlled amplifier

Voltage Controlled Mixer w/Modulator

Voltage Controlled Panner

VU And PPM Audio Metering

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