Questions tagged [digital-audio]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
-1 votes
3 answers
84 views

A way to make simple digital potentiometer [closed]

I am making a project which has an audio application with a TDA amplifier. To change the volume I have a potentiometer on the input of the amplifier so when you change its value the sound is higher or ...
user avatar
4 votes
1 answer
130 views

If I invert an I2S data line, it inverts the audio, right?

It seemed obvious to me, but then I read all these audio forums where they're talking about overflow, tones, etc. and I just want to make sure I'm not missing something. If you take an I2S signal: ...
user avatar
  • 27.8k
0 votes
0 answers
52 views

Is Bluetooth a bottleneck for audio quality when using a headset?

Context - My hearing impaired friend cant hear me well when I use a Bluetooth headset A close friend and I enjoy talking on the phone while commuting. Unfortunately his hearing has gotten worse (...
user avatar
0 votes
0 answers
22 views

Is an AK4588VQ decoder able to pass PCM digital audio with its ADC digital interface?

I want to interface an AK4588VQ with only at maximum 5 wires. Is it possible? My system uses an STM32F746NG and requires two digital microphones (I2S) and one DAC. I've used this chip because I have ...
user avatar
0 votes
1 answer
72 views

My speaker connected to my TV is making weird noises only when playing videos [closed]

Apologies if this is the incorrect forum, if anyone knows of a better forum to ask on I would appreciate the redirection. I have a very specific issue regarding audio playback from my TV. I have a ...
user avatar
1 vote
1 answer
93 views

Can I have a microcontroller with one I²S module as digital signal processor?

I was not very sure what title I should use, but the idea is: We have a Bluetooth module (BM64) and a DAC (PCM5122.) We want to put the microcontroller (STM32 Nucleo-F303K8) in between for digital ...
user avatar
  • 11
0 votes
1 answer
125 views

How to remove low-level audio noise from an ATMEGA328p + LM386 circuit

I'm building an audio project with an ATMEGA328p using an LM386 as the amplifier and the Mozzi audio library. Power source is 4 AA batteries. I'm using an MCP1700 voltage regulator to drop the ...
user avatar
1 vote
0 answers
60 views

Best way to output n digital signals using n-1 DAC channels

I have 3 digital signals that need to be mixed and output into the analog domain. My DAC has 2 channels (Left and Right). The way I see it, I can: mix the signals 1, 2, and 3 digitally and output ...
user avatar
  • 11
0 votes
1 answer
54 views

Get AES/EBU signal from S/Pdif

Recently on the road with an Audio Engineer, I've heared that (Coaxial) S/PDIF and AES/EBU are quite similar and could be passively adapted, and said that these two signals are the same on the logic ...
user avatar
  • 358
1 vote
1 answer
554 views

Multi channel I2S vs TDM

I need to receive 8 channels of 24 bits at 48KHz. So I have two possibilities to accomplish that: either using 4 I2S or TDM. I would like to understand the difference in clock rates between I2S and ...
user avatar
  • 111
2 votes
0 answers
92 views

Interfacing PCM3060 Audio Codec With STM32

I am using a STM32F4 MCU, currently prototyping on a Nucleo-F446RE. I have a PCM3060 audio CODEC to do the analog to digital conversion. I am attempting to use the I2S protocol in order to interface ...
user avatar
  • 21
0 votes
1 answer
74 views

Understanding input/output in audio amplifier

As I was trying to refurbish my Sony STR-434BS, I choose to install a brand new audio amplifier IC, specifically the TDA8954 as main chip for it's power deliver (around 100 [W] in stereo mode) and ...
user avatar
0 votes
1 answer
97 views

DC filtering for digital audio amplifiers

I am working with digital amplifiers and from what I can see there is a DC blocking filter that is placed at the start of the signal chain. Why is this DC filter placed at the start of the signal ...
user avatar
0 votes
2 answers
95 views

analog vs digital automatic level control

In an analog broadcast audio chain, an automatic gain control (AGC) or compressor is employed to maintain a nearly constant average audio level fed to the over-the-air transmitter. In a digital audio ...
user avatar
0 votes
0 answers
31 views

Dependence of the PWM amplitude of the amplifier on the battery voltage

I'm going to use speaker connected to internal Class D amplifier in WM8998 in my PCB. Power source of my PCB is Li-Pol battery with 3.2-4.1V range or external 4V adapter. Audio codec speaker power ...
user avatar
0 votes
1 answer
69 views

What would be the best, cheapest, smallest way to power a Bluetooth bone conduction headset project?

Please, be forewarned, I'm an idiot when it comes to electronic builds. The last thing I soldered was a pick-up in a guitar kit I built, and the thing still isn't grounded right. I'm trying to build a ...
user avatar
1 vote
0 answers
40 views

Would an LM7805 need a heatsink stepping down two stacked LiR2032/CR2032 (3.6V X2) batteries?

Okay, I'm terrible at anything electronic, especially when it comes to building from boards (think rudimentary understanding). I've built a few PC's in my day, but piecemeal, not from scratch. Keep ...
user avatar
0 votes
1 answer
56 views

alternative values of these resistor in circuit?

i am working on a spectrum analyzer, concept is to feed audio signal to esp32 and perform FFT at 40000hz sampling rate. I tried MIC input but did not get satisfied by results. link to diagram I found ...
user avatar
0 votes
0 answers
156 views

Transmitting I2S over 6ft

I've been looking at audio ADCs with most rated at 192Ksps with 24 bit audio. Typically the output is in I2S, but I understand that the signal is not intended to go far. I understand that HDMI can ...
user avatar
1 vote
3 answers
261 views

Noisy AES audio signal in studio installation

This is a question about digital audio cables. I know this isn't an audio engineering forum but the question's specific to the physical connections and there's limited info online which I can find ...
user avatar
4 votes
1 answer
433 views

The relationship between bit depth and SNR in ADC

An 8-bit audio signal has a theoretical maximum SNR of 48.16 dB (20log(2^8)). My question then would be, does this work in reverse, i.e. would an analogue audio (or video) signal with an SNR of <=...
user avatar
0 votes
1 answer
418 views

I2S between multiple devices

I am trying to design an audio amplifier based on a digital input chip (TAS6424-Q1 for example) with two, stereo, I2S enabled sources for the input (for example the BM83 Bluetooth module and the ...
user avatar
  • 109
2 votes
1 answer
921 views

How can I convert an audio PDM bitstream into analog form?

I have collected PDM bitstreams from MEMS microphones and I'm looking to convert them into analogue form. Does anyone know some practical implementation details on how to do this (beyond a quote from ...
user avatar
  • 45
1 vote
1 answer
127 views

Is it relatively simple to design an ADC to ADAT interface with only a Toslink port?

For this project (I'm an experienced audio engineer but a relative beginner in electrical engineering) I really want to integrate a simple ADC to ADAT circuit in a patchbay I'm building so that I have ...
user avatar
0 votes
0 answers
25 views

How to set up SPIDF channel bits for high sample rate output?

The original SPIDF standard supported sampling rates only up to 48kHz, but today much higher sample rates are supported. The sample rate was set by controlling channel status bits, which also ...
user avatar
  • 145
0 votes
3 answers
529 views

Merging two different HDMI cables

I have two brands of broken HDMI cables that I need to join to make them longer. Can't join them by color, because they are completely different. Plus, one of the cables has all the wires, the other ...
user avatar
  • 125
1 vote
1 answer
117 views

Overheating Linear Voltage Regulator In Lexicon Omega Audio Interface. Can I Swap With Reduced Amperage To Avoid Heat Probs?

I have a Lexicon Omega USB Audio Interface that's overheating. Already tried several heatsinks, including the biggest one I could get (6"Hx2.5"Wx.5"D) with optimized cross-cut vertical fins, mica ...
user avatar
  • 11
0 votes
2 answers
50 views

Can we get higher internet speeds even with low BW message signals?

Consider a case where i’m listening to a recorded audio on internet.Basically the useful audio Frequency range lies b/w 40hz to 4khz, which has a BW of 4khz which is pretty low ,does that mean the ...
user avatar
0 votes
2 answers
695 views

How to play music on PAM8610 with ESP32?

I'm trying to use Xtronical's DAC audio library on an ESP32 to run 10W speakers. The board that Xtronical used is a PAM8403 which has a signal voltage range of -0.3V to +0.3V but as it can only run 3W ...
user avatar
1 vote
1 answer
216 views

How to interface a microphone to an I2S input to use HFP

For my group's SDP/Capstone we are doing a bluetooth headset of sorts. We are using a CYW20706 SoC from Cypress. Specifically, we are using a this CYBT-343026-01 Cypress module whch includes that ...
user avatar
0 votes
1 answer
115 views

What type of audio output does this symbol represent?

I have this picture. I want left, left ground, right and right ground output. Pin. But I can't understand it. Can somebody please help me. Thanks.
user avatar
0 votes
1 answer
383 views

Low latency digital wireless audio transceivers

I would like to start a project developing diy low latency digital audio transmitters. Issue is there is not much information online and I'm unsure where to start. I live in England UK, I would like ...
user avatar
  • 33
2 votes
1 answer
382 views

CSR8645 3.2 bluetooth module audio output merge negative pins

I want to use this module with my car aux in which is has 3.5mm 3 pole jack. This module has separate negative pins as LN and RN. I need to merge and connect these pins to aux in common negative pin.
user avatar
2 votes
3 answers
2k views

S/PDIF: TTL to Coax Converter

I'm working on converting TTL S/PDIF to Coaxial level (0.5Vpp). I have implemented the following circuit using a Toshiba TC7W04, which is a 74HC04-type inverter: But it does not appear to work in ...
user avatar
  • 461
2 votes
2 answers
204 views

How to analysis this Operational-Amplifier circuit?

This is a reference buffer circuit that make a single-end audio input to be the differential inputs for ADC. Circuit-1: It does not like typical Op-Amp circuit of the same purpose like below. ...
user avatar
1 vote
2 answers
1k views

I2S MCLK Generation

I'm working with a Sierra Wireless BC127 (Bluetooth Module) I2S master which is generating Left-Justified, 16 bps @ 44.1khz sample rate. The Bit clock is set to 2.822 Mhz. I want to use a Cirrus ...
user avatar
  • 461
0 votes
1 answer
138 views

SQNR and Dynamic Range

An audio tone \$Acos(\omega t + \theta)\$ undergoes uniform quantization by a quantizer that has the average quantization noise power \$q^2/6\$ joules, where \$q\$ is the quantization step size. If ...
user avatar
  • 1
0 votes
1 answer
91 views

Translating/reverse engineering firmware commands

I'm trying to build my own Hi-Fi system. So, I recently ordered this Japanese DSP that's able to process Dolby audio. I was all excited until the part had arrived and I found something in the ...
user avatar
  • 159
0 votes
1 answer
476 views

AUX input or microcontroller in a musical tesla coil?

Alright so I am making a musical tesla coil. I have seen some online tutorials and what I noticed is that some people are giving the audio input using a microcontroller and programming it to produce ...
user avatar
  • 1
0 votes
0 answers
631 views

I2S DAC Volume Control

First of all, let me preface this with the fact that I'm not an EE -- I'm a hobbyist with some experience and a background in software development. I'm trying to use a TI PCM5102A Audio DAC with a ...
user avatar
  • 461
0 votes
1 answer
142 views

Impedance matching between CSR8675 and a MM20 microphone

I'm building my own (rugged) headphone. I am planning to use a MM20-33639-000 microphone with CSR8675 DSP. My question here relates to impedance matching. Based on what I have read, most modern ...
user avatar
0 votes
1 answer
281 views

Understanding Audio Amplification with OpAmp

I have what I believe to be a fairly simple schematic, as shown below, to take either a PWM signal from an AVR board to play a song/alarm, or radio signal. I'm connecting both of these with a ...
user avatar
2 votes
2 answers
2k views

How to interface to a PDM audio source?

I hear about this technology, I read about it, I even see a bunch of MEMS microphones with PDM output. I can perfectly understand how it works (I have worked with DSP). However, I can't seem to ...
user avatar
  • 1,876