Questions tagged [digital-audio]
The digital-audio tag has no usage guidance.
14
questions
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28 views
Ground connection in audio selector and signal level sensor ICs
I'm designing a circuit that uses two ICs from New Japan Radio (NJR):
NJW1110 - 9-Input 3-Output Stereo Audio Selector (https://www.njr.com/semicon/PDF/NJW1110_E.pdf)
NJU7181 - Signal Level Sensor (...
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1answer
82 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.
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1answer
65 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 ...
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1answer
52 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.
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3answers
170 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 ...
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2answers
87 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.
...
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2answers
263 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 ...
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1answer
47 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 ...
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1answer
75 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 ...
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1answer
126 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 ...
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312 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 ...
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1answer
71 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 ...
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1answer
164 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 ...
0
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1answer
715 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 ...
