circuit diagram sound

Turbo Bass circuit diagram

This circuit is a circuit of the turbo bass that can be used to multiply the low frequency sound signals (bass) on your audio system. This circuit is an active circuit in which the incoming audio signal from the input will be strengthened in the first op-amp. The second op-amp that will filter out the bass signal to set gains so you can get the power of the bass as you want.
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Eight Sound Effects Generator circuit diagram

Here teh circuit diagram of eight sound effects. The circuit will generate 8 type of sound effect, amplify the audio signal, so you will hear the sound directly from the speaker.

IC KS5401 will generate the sound, while TR D438 used to be amplified the audio signal. I’ve try to find the datasheet for KS5401, but unfortunately I did not find it

Six LED Stereo VU Display circuit diagram

The following circuit is six LED stereo VU display diagram which build using Dot/Bar Display Driver IC LM3915. This VU disply should be connected before amplifier module circuit. You may connect this circuit at pre-amp output, tone control input/output or equaliser input/output.

About LM3915:
The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs, LCDs or vacuum fluorescent displays, providing a logarithmic 3 dB/step analog display. One pin changes the display from a bar graph to a moving dot display. LED current drive is regulated and programmable, eliminating the need for current limiting resistors.
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Hi-Fi Tone Control circuit diagram

This is a cheap high fidelity (hi-fi) tone control circuit. The schematic is one channel (mono) tone control, build the similar circuit will make it become stereo.

Use good component (such as metalfilm resistors, MKM capacitors, tantalum capacitors, good cable quality) and stabilized power supply for better sound quality output.
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Audio Mixer + VU Meter circuit diagram

This is audio mixer circuit. The circuit is for one channel input, if you need, for example 5 channel mixer, then you need to build 5 similar circuits.
Schematic diagram:

Component part list:
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Echo Chamber circuit diagram

Below circuit is an echo chamber circuit which can be used for smoothing your voice from the microphone. This circuit may used for any kind of audio signal (microphone, radio, mp3 player, etc).

An echo chamber (echo repeater) is a hollow enclosure used to produce echoing sounds, usually for recording purposes. For example, the producers of a television or radio program might wish to produce the aural illusion that a conversation is taking place in a cave; this effect might be accomplished by playing the recording of the conversation inside an echo chamber, with an accompanying microphone to catch the echoes.
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