Questions tagged [digital-audio]
The digital-audio tag has no usage guidance.
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Inline volume control for analog audio signals with push buttons [closed]
I want to build something to control the amplitude of analog audio signals between the source (line level analog audio output already extracted and decoded from an HDMI source) and the AMPs. In ...
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Why is there a greater lag in Bluetooth headphones compared to wired?
The Usual Answers and Responses:
Encoding, Compression, and Buffering
The typical answer to this on the internet is because Bluetooth headphones require the conversion of one form of data information ...
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STM32F7: How to store one cycle of sinewave (1kHz) in array as PCM data?
I'm using a STM32F746 discovery board to learn about digital audio. I'm doing the basics right now. I want to store a single cycle of a 1kHz sinewave in an array and eventually use a DMA to transfer ...
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Designing support for BT in a car's audio system
We are designing a pre-amplifier outputting I2S and need to stream this to a car's audio system via Bluetooth. We have tried a module from TinySine, but it turned out it can only connect to headphones....
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TDM signal conditioning
I'm looking to transmit TDM signals (digital audio) over long-distance cables (around 5 meters). I did some tests with an oscilloscope and the signal is getting too much distortion. I was wondering if ...
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Is it possible to add headphones to a Geiger counter circuit?
The main problem is as follows. From what it seems, most Geiger counter circuits opt for a piezo clicker. I'd like to just plug in a 3.5mm audio jack and be able to hear when pulses come in. The ...
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Calculating audio sample output rate for synthesizer
I'm building a synthesizer on an FPGA and I'm having trouble calculating sampling rates. Currently, I'm running a system clock at 98.3 MHz and I want to produce 16-bit audio at the output.
I've got a ...
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Reason for the degraded I2S signal
I'm working with one of the devices from the NXP's IMX family - the IMX93 evaluation board.
I've managed to setup the sound card drivers already, the next step was to test I2S signals output via the ...
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How to receive digital audio via polling the SAI?
I'm trying to receive digital audio on an STM32 by polling the SAI, via HAL_SAI_Receive. Eventually I will switch to DMA; my goal now, though, is to simply be able ...
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What is SAI frame synchro?
The SAI interface, as used by ST and others, includes some options which I have not been able to find any explanation of. Justme's answer provides a great explanation of frame, slot, and data size; I'...
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Can I capture audio over SPI on from the onboard MEMS microphone?
I have a STM32H735G-DK Discovery board and would like to record audio from the onboard digital MEMS microphone, a MP34DT01TR-M which provides PDM audio.
It would seem to me the simplest way to do ...
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Regular DACs versus audio DACs
Context
In trying to make modular linear power supply with digital control, I figured I'd need a DAC to output the correct voltages into the feedback circuitry (two - one for voltage and one for max ...
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USB Audio interface, voltage regulator failed, what happens to the connected circuitry?
I tried to build an open-source (and unfortunately not longer maintained) USB Audio interface (https://github.com/freeDSP/freeDSP-INFINITAS).
The project is built around a XMOS chip XE216-512 and a ...
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What's the relationship among speaker amp IC's supply voltage and gain?
I am new to designing audio circuit. Looking at TI TAS6424 class-D amplifier (https://www.ti.com/lit/gpn/tas6424-q1), on section 9.3.3 p.23, it mentioned volume control from -100 to +24 dB.
Given the ...
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How long is the S/PDIF preamble?
I have a simple S/PDIF protocol question that I can't find the answer to anywhere. I'm trying to understand the protocol, and everywhere I look says the same thing: The length of a preamble pattern is ...
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