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Audio Tone Balance Circuits

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Attenuating a
feedback tone control circuit

FIG
is a decay feedback tone control circuit. In the tone control circuit both
have anti-attenuation Fed action. So high, in the end it is to enhance or
attenuate the bass, and

Electronic type
bass equalization circuit

Electronic
bass equalizer type of two quad op amp circuit, you can use TL084 high-speed
operational amplifier circuit shown in Figure 9-680 left and right channels
through R1,

Circuit having a
high school bass tone function

Figure
4-7 pitch analysis using the relation obtained above design calculation
control circuit, where Ai is a buffer to put the big stage, to reduce the
burden preamp output. L

Variable corner
frequency tone circuit

By
selecting an attenuation switch to change the pitch of a feedback control
circuit transition frequency real cases. Hu) for 2 treble controls,

An attenuated tone
control circuit diagram

This
article is an attenuated tone control circuit diagram. This circuit is mainly
composed of transistors and RC networks are network components. As
shown

Active crossover circuit with TL074

An audio source, like a mixer, preamp, EQ, or a recorder, is fed to the
input of the Electronic Crossover Circuit. This signal is either AC or
coupling, depending on the setting of switch 51, the non-inverting input of
buffer amplifier Ul-a, a section of a quad BIFET, low amp TL074 noise made by
Texas Instruments op. This stage has a gain of 2,...

Alc
(Automatic Level Control) Circuit

The rectifier input is tied to the input. This makes gain inversely
proportional to input level so that a 20-dB drop in input level will produce a
20-dB increase in gain. The output will remain fixed at a constant level. The
circuit will maintain an output level of 1 dB for an input range of +14 to -43
dB at 1 kHz.

Tone control circuit

A
simple single-transistor circuit will give approximately 15 dB boost or cut at
100 Hz and 15 kHz respectively. A low noise audio type transistor is used, and
the output can be fed directly into any existing amplifier volume control to
which the tone control is to be fitted

Baxandall Tone-Control Audio Amplifier

This circuit exploits the high slew rate, high input impedance, and high
output-voltage capability o

Guitar treble boost

Ql
is connected as an emitter follower in order to present a high input impedance
to the guitar. C2, being a relatively low capacitance, cuts out most of the
bass, and C3 with RV1 acts as a simple tone control to cut the treble, and
hence the amount of treble boost can be altered.

Stereo balance meter

Play
any stereo disc or tape and then set the amplifier to mono

Stereo balance meter

Outputs
from each channel are fed to the two inputs of ICl connected as a differential
amplifier. IC2 and 3 are driven by the output of ICl. Output of ICl is
connected to the noninverting inputs of IC2 and 3. If the output of ICl
approaches the supply rail, the outputs of ICs 2 and 3 will also go high,
illuminating LED3. This would happen if the...

Rumble-scratch-filter

This
is a variable bandpass amplifier with adjustable

Stereo Preamp With Tone Control Circuit

A Motorola TCA5500 or TCA5550 can provide a stereo preamplifier system with
tone controls. This circuit provides a gain of about 10X, a 14-dB tone-control
range, a 75-dB volume control range, and it can operate from 8 to 18 Vdc. IC2
provides 15 V for ICl, and the input of IC2 can be supplied from the power
amplifier`s power supply (+) rail.

Stereo Balance Meter Circuit

When L R signals are equal, no output is present from Ul, and pin 6 is at a
steady 4.5 V. Unbalanced audio causes the LEDs to vary in
brightness,

Stereo balancer

This
circuit will allow you to set the gain of two stereo channels to the same
level. The signal across the two channel-load resistors is sampled by
resistors R2. (Values of these resistors will depend upon the power level) For
most 20 milliampere LED, use approximately 2 K per watt. (For a 10-watt system
use a 25,000 ohm resistor) To set up,...

Stereo balance tester

The
meter will show volume and tone control balance between left and right stereo
amplifiers. For maximum convenience the meter is a zero-center type. Resistors
are five percent or better and the diodes a matched pair. Optimum stereo level
and phase balance occurs for matched speakers when the meter indicates
zero.

Tone control

Tone
control of audio systems involves altering the flat response in order to
attain more low frequencies or more high ones, dependent upon listener
preference.

Stereo balance meter

To
use the indicator, switch the amplifier to mono mode and adjust the balance
control until both LEDs are equally illuminated.

Audio Expander Circuit

This audio processor is based on the Signc tics/Philips TDA3810N stereo,
spatial, pseudo-stereo processor, IC. This processor uses a Philips TDA3810IC
device, and it functions as an expander, pseudo stereo processor, and audio
enhancer.

Tone-control audio amplifier

The
circuit makes excellent use of the high slew rate, wide bandwidth, high input
impedance, and high-output voltage capability of the CA3140 BiMOS op amp. The
wideband gain of this circuit is equal to the ultimate boost or cut plus one,
in this case a gain of eleven.

Ten-band-octave-equalizer

A
series of active rffilters using National LM3481C comprises a ten-band graphic
equalizer. Cl, C2, Rl, and R2

Hi-fi tone control circuit

The
2N5458 JFET provides the function of a high input impedance and low noise
characteristics

Passive tone-control circuit

A
simple circuit using two potentiometers and easily available standard value
components provides tone control.

High quality tone control

The
circuit is based on an inverting op amp using discrete transistors to overcome
poor slew rate, fairly high distortion, and high noise problems. The output
stage is driven by a constant current source, biased by a green LED to provide
temperature compensation. With the controls flat, the unit provides unity gain
so the stage can be switched...

Stereo Preamplifier with balance and loudness

The circuit of preamplifier use the 5533 chip and features a combination
of controls balance and volume. Due to the nonlinearity of the human auditory
system, low frequencies must be boosted at low listening levels.

Digital Automatic Level Control (Alc) Circuit

This approach to automatic level control (ALC) makes use of digitally switched
audio attenuators in the signal path. The output level of the system is
sensed, compared to a reference, and audio pads are inserted via analog
switches.

Wien-bridge-filter

Most
audio tone controls affect midband gain, and !bey often create booming or
hissing sounds when activated. You can avoid tbese problems by using a dual
Wien-bridge filter to provide independent control of tbe treble and bass
frequencies. Experiments witb equalizers indicate that tbe optimum center
frequencies are about 100 Hz and 8 kHz.

Tremolo Circuit

This circuit adds a VLF AM component to an audio signal. This effect is widely
used in musical instruments. U1C, a phase-sh

Agc
System For Audio Signals Circuit

This circuit is an AGC system for audio-frequency signals. AGC systems usually
consist of three parts: an amplifier, rectifier, and controlled impedance. In
this circuit the functions of an amplifier and a rectifier are performed by a
single op amp. This makes the system simple and cheap.The rectifier is made
with the output push-pull cascade...

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CW117
CW217 CW317 charger has a current-limiting protection configuration

As shown in Figure is a limiting protection charger. VT transistors and
resistors R3 form limiting network. Seen from the figure, the resistor R3 is the
base of transistor VT e

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