Modulador de VOZ diferentes modos y niveles, principalmente robot, vibrato. Se usa para telefonos, sistemas de audio, etc.
Hay algunos proyectos para usarlos con guitarra, aunque no es su objetivo principal para eso esta el PT2399 (DIFICIL DE CONSEGUIR) pero tambien lo tengo
HT8950/HT8950A -- Voice Modulator
The HT8950/HT8950A are single chip CMOS LSI voice modulator ICs which provide seven steps to shift the frequency of an input voice, producing a dramatic change in the output.
The HT8950/HT8950A provide two special effects: Vibrato and Robot. The Vibrato effect is generated by alternating the frequency of an input signal up and down at a rate of 8Hz. The Robot function, on the other hand, converts an input voice into a Robot voice. Both effects can be selected depending on which pin is triggered, either ROB or VIB. For the output frequency level shifting, the chips provide seven steps which can be selected from the two groups of pins namely, SW0, SW1 and SW2 for electronic direct selection and ROB, TGD, TGU and VIB for push button selection.
The HT8950/HT8950A include a built-in microphone amplifier with an internal bias, an 8-bit A/D converter, a built-in SRAM as well as a current output type 8-bit D/A converter. The 8-bit A/D and D/A converters with a sampling rate of 8kHz ensures a high quality and high S/N ratio output voice. The chips provide an LED indicator which flashes in accordance with the volume of the input voices.
PT2399 is an echo audio processor IC utilizing CMOS Technology which is equipped with ADC and
DAC, high sampling frequency and an internal memory of 44K Digital processing is used to generate
the delay time, it also features an internal VCO circuit in the system clock, thereby, making the fre-
quency easily adjustable. PT2399 boast of very low distortion (THD<0.5%) and very low noise
(No<-90dBV), thus producing high quality audio output. The pin assignments and application circuit
are optimized for easy PCB layout and cost saving advantage.
r CMOS Technology
r Least External Components
r Auto Reset Function
r Low Noise, No<-90dBV Typical
r Low Distortion, THD<0.5% Typical
r External Adjustable VCO
r Available in 16 pins, DIP or SO package
r Video Tape Recorder
r Video Compact Disk
r CD Player
r Car Stereo
r KARAOKE Mixer
r Electronic Musical Instrument
r Audio Equipment with Echo Processor