Multi-band amplifier with digital DSP and i2S amplifier modules.

Here it is very nice to tune each band on the microphone “on the go” without recording to a USB flash drive – just measure on the fly, insert a filter and align everything. Auxiliary ADC AUX channels – 8 Input/output precision – 32 bits
1. The input selector module is switched by one button on the universal input/output pin GPIO16/ This one also works fine without problems. And there are a lot of settings inside. 6. Direction to i2S exit. The most popular DIY processor is the ADAU1701. link That’s where I understood the problem areas of such processors and their super advantages. Until recently, I used an AD1853 DAC and a 6CA7 single-cycle tube in the system. Switching to 96 is hypothetically possible, but you need to change the firmware with the controller and, in theory, also reconfigure the clock generator. If you sweat a lot, then you can adjust the correction on FIR filters that do not twist the phase. I’ll tell you about SSM3582A separately/ 5. It will probably be a separate epic. Digital outputs (I2S) – 4 Essentially, the DSP is switching to using its own oscillator rather than taking the masterclock from the i2s input, this is set in SigmaStudio. It’s the easiest to use. I did not use this chip due to the integration of simple ADCs and DACs into it and a small margin in terms of computing power expressed in the number of commands per sample. But again my hands itched on the soldering iron and the microphone and away we go)))). In the module table, the change step and the maximum level are entered. This is the second part of the Marlezon ballet about a two-band shelf speaker. I2C and SPI control interfaces (master or slave) Project scheme: Information in Russian on how to set up the system in Sigmastudio is sooooo scarce, and if you don’t have English without a dictionary, then it’s very difficult to understand. And if they have a phase shift, there will be a surge in the PFC and there will be nothing good to hear in this zone of joint sound. The processor is programmed in Sigmastudio link and you can do a lot in it. And if a modern source is digital, then why do the complicated way of a digital-to-analogue converter in a sound card or DAC … then analog-to-digital conversion at the input of the chipboard … then digital processing in the processor and the next digital-to-analog conversion at the output of the chipboard.< /p>
I tried resampling in 48. I assembled a computer with windows 7 64bit the same song. I scored on such support and installed SA9023 – everything worked as it should from half a kick. 7. 2. Or put quartz on the board and clock everything from it. Works the same way. There is an automatic correction module for the MLSSA file. My first experience with DSP was when setting up a fancy 3-lane project using a Berringer DCX2496 processor. The main problems are a frail ADC at the input and hiss in the sound. The two variants of XMOS converters also play without problems. 4. 4 1. Delay module for RF channel. ASRC module – resampling of everything included in 48 kilohertz, to the frequency of the project. 3. The Kenwood LS-11EX speaker systems on the Davis KVK 130 fit the mood and generally made the acoustics different. Stereo S/PDIF input and output Chinese boards have LDO stubs on board.

Multi-band amplifier with digital DSP and i2S amplifier modules.

Resistor volume control – The ADC input on this pin calculates the voltage level across a variable resistor from 0 to 3.3 volts and adjusts the input signal level. The heart of the system is the ADAU1467 digital signal processing module. 3. Two-band crossover – here we set the number of bands, crossover frequencies, the difference in the level of the bands, and the type and slope of the cutoff filter. Guzzles DSP of the order of an ampere constantly. 2. There was no time to listen at home, and there was no opportunity to engage in creativity either. If there is no 3.3 volt power supply in the comb at the i2s input, then it supplies its clock, and if there is, it conducts what comes from USB. From USB, at 48 kilohertz, 12.288 megahertz should come according to my sigma studio settings (this is the MasterClock settings block). Intensifying modules. 2. link There are also a bunch of programmable GPIOs in case 4 standard i2s are not enough Digital inputs (I2S) – 4 Auto-equalizer module – automatic equalization of the frequency response according to the measurement curve with a microphone in the MLSSA format. Therefore, I had to buy RDC1-0028, Double DC-DC. But unlike the first act, this project can be repeated by any sufferer. The block has an ASRC module and the input audio stream of audio data can be resampled to the DSP frequency on the fly. Maximum sampling rate – 192 kHz There is no voltage regulator on the Chip-Dip board to reduce the cost, and the DSP operates from 3.3 volts. DSPO link – a convenient i2s connection scarf – a connector with its own 12.288 MHz quartz oscillator with buffering and its own 5V power supply. 7. Therefore, be careful – you, too, can earn so crookedly and there is no place to wait for help. The idea to create a multiband amplifier with correction, and even on a modern element base, was hampered by the very poor parameters of Class D amplifiers and very frail available DSP chips of Digital Signal Processors.
link Frequency response correction on filters for each band. Features of this cpu: Consider my project: The processor operates at a fixed frequency of the project, that is, if 48 kilohertz is set in the project, that means everything. Two speakers play the same frequencies in the crossover zone. All by
The microphone is again exposed and visible. BUT MCLK should remain alone, because it is, in fact, a clock generator for the DSP. I have a bunch of converters – took it and forgot the problem. Inside the Berringer there is an AMD Shark DSP processor and a very outdated control module via the RS-232 COM port, an old DAC and ADC, and a switching power supply of not very high quality. But it turned out to be much more accurate to do everything by hand.

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