CXD2721Q-1 Overview
The CXD2721Q-1 is a Karaoke LSI suitable for use in video CD/LD/CD-G/CD and the like. A large capacity DRAM and AD/DA converters are built in, and a Karaoke mode providing simple surround and Karaoke functions such as key control, microphone echo and voice cancelling, and a music mode providing functions such as surround, parametric equalizer and bass/treble tone control are contained on a single chip.
CXD2721Q-1 Key Features
- 3-channel 1-bit AD converter, decimation filter and prefilter operational amplifier S/N ratio: 92dB THD + N: 0.02% Filte
- 2-channel 1-bit DA converter, oversampling filter and post filter S/N ratio: 97dB THD + N: 0.005% Filter pass band rippl
- In addition to analog I/O, digital I/O (2-channel input/2-channel output) are provided. The interface also supports a wi
- 128K-bit DRAM for key control, microphone echo and surround processing Functions
- Key controller pitch settings can be varied to a maximum of ±1 octave with a precision of 14 bits
- Microphone echo delay time can be varied to a maximum of 278ms (when Fs = 44.1kHz)
- Voice canceller supports settings other than center using panpot volumes
- Voice parametric equalizer
- Voice pitch shifter
- Mixing function to support sound multiplexing software 100 pin QFP (Plastic)