![]() Among the proposed six fixed AFCs four are determined by the nature of music and two are auxiliary, provided to help you record correctly, taking the playback conditions into account. When setting up level for any particular frequency for the respective filter one can select the bandwidth determining the slope of each filter (in this device inclusion is denoted as Q - factor). We are primarily interested in the equalizer, which provides adjusting in each of the 24 bands, the central frequencies of which, of course, comply with the ISO standards. Digital signal is simultaneously derived with analogue signal.A very complex device which includes an equalizer as just one of the parts of the total: there are also an echo mode reverberator, a mixer for mixing the signals from two microphones in karaoke mode and a Digital Sound Processor (DSP), which provides a simulation of acoustic properties of six different rooms. ![]() In the corrector's back there is a switch, through which you can select the source of the signal (analogue or digital) – it switches DATA line between CS8420 and the A/D converter in the corrector. ![]() That program controls the Crystal system through emulated I2C bus. A program for PIC12F509 microcontroller was written in Assembler. CS8420 needs to be configured properly and its work should be supervised. CODEC is clocked by a DSP clock with a frequency of 384*Fs. From DSP the signal goes to CS8420 via I2S to the optic transmitter. Then the signal goes through the I2S bus to DSP. In this case, digital signal from the IR receiver goes to the sample frequencies converter (just in case Fs was different from 44,1kHz used in DSP). It has a receiver and transmitter SPDI/F, two audio ports and a sample frequencies converter, all configurable in different ways. You should use service instruction for SH-GE90 (scheme) and specification of the A/D and D/A converters that are located in the corrector. Due to the improvement of the quality of the audio track, you can get rid of so frequent digital-analogue and analogue-digital conversion. Thus digital audio sound from CD is converter in the D/A converter to analogue, then again sampled in EQ and after the signal processing, re-changed. It means that using CD player with TOS-LINK output, you have to use analogue stereo output. ![]() SH-GE90 from Technics), which despite the digital signal processing does not have digital audio inputs and outputs. It is a useful device for owners of a digital equalizer (e.g. ![]()
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