A thread for discussion and capability discovery of the DSP enabled amplifier from 3e Audio
https://www.3e-audio.com/finished-amp/tpa32xx-all-in-one-amplifier/
Built around the Sigma Audio ADAU1701 DSP, it offers programmable control of the audio allowing speaker and room correction combined with a Class D amplifier in a one box solution.
Auto switching between RCA (Analogue) and Bluetooth (Digital) input sources - when no audio or no play from Bluetooth, it will auto switch to RCA source.
Has on-board header for programming that requires a USBi programming interface (Available from 3e Audio soon after the amp is available, or from a variety of other sources in the form of freeUSBi).
Connection for the DSP is a standard USBi connector
Free USBi driver installation guide from 3e Audio and the FreeUSBi guide from Free DSP. Note the special steps with Win10 FreeUSBi driver installation that requires disabling of driver signature enforcement.
Note the SDA and SCL should have 2.2 kΩ pull-up resistors on the lines connected to them. The voltage on these signal lines should not be more than 3.3 V. If connecting a board such as the easily available CY7C68013A, the additional 2.2k resistors need adding.
SigmaStudio is the programming development environment - https://www.analog.com/en/design-center/evaluation-hardware-and-software/software/ss_sigst_02.html
with included DSP functions such as automatic speaker EQ - https://wiki.analog.com/resources/t...udio/toolbox/adialgorithms/automaticspeakereq
Using REW to sample the output from speakers its possible to use the auto EQ function in SigmaStudio to design a correction filter and upload to the amplifier, exampled here: https://ez.analog.com/dsp/sigmadsp/f/q-a/64304/adau1701-sigmastudio-rew-auto-eq/362660#362660
https://www.3e-audio.com/finished-amp/tpa32xx-all-in-one-amplifier/
Built around the Sigma Audio ADAU1701 DSP, it offers programmable control of the audio allowing speaker and room correction combined with a Class D amplifier in a one box solution.
Auto switching between RCA (Analogue) and Bluetooth (Digital) input sources - when no audio or no play from Bluetooth, it will auto switch to RCA source.
Has on-board header for programming that requires a USBi programming interface (Available from 3e Audio soon after the amp is available, or from a variety of other sources in the form of freeUSBi).
Connection for the DSP is a standard USBi connector
Free USBi driver installation guide from 3e Audio and the FreeUSBi guide from Free DSP. Note the special steps with Win10 FreeUSBi driver installation that requires disabling of driver signature enforcement.
Note the SDA and SCL should have 2.2 kΩ pull-up resistors on the lines connected to them. The voltage on these signal lines should not be more than 3.3 V. If connecting a board such as the easily available CY7C68013A, the additional 2.2k resistors need adding.
SigmaStudio is the programming development environment - https://www.analog.com/en/design-center/evaluation-hardware-and-software/software/ss_sigst_02.html
with included DSP functions such as automatic speaker EQ - https://wiki.analog.com/resources/t...udio/toolbox/adialgorithms/automaticspeakereq
Using REW to sample the output from speakers its possible to use the auto EQ function in SigmaStudio to design a correction filter and upload to the amplifier, exampled here: https://ez.analog.com/dsp/sigmadsp/f/q-a/64304/adau1701-sigmastudio-rew-auto-eq/362660#362660
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