3
votes
Accepted
LTspice-RIAA-simulation not working out
Your output "vinyl" mimics the gain plot of the preamplifier. You need to flip things around so "vinyl" has a lower output at low frequencies and a higher output at high ...
- 3,745
2
votes
Symmetric audio signal output on single voltage circuit
There's a difference between:
Symmetric, where both positive and negative halves of the differential signal have opposite voltage
Balanced, where both positive and negative halves of the ...
- 57.4k
2
votes
Can't find the datasheet of cheap Bluetooth audio reciever
I found the datasheet corresponding to the AC6926A4 chip, in the following link:
Encontré el datasheet correspondiente al chip AC6926A4, en el siguiente link:
http://en.tome-sz.com/...
1
vote
Stereo I2S To USB Audio
CM108 meets your need (I2S to USB).
USB dongles of CM108 are sold for around $3.
Set pin ADSEL high to use I2S inputs instead of internal ADC.
- 11
1
vote
LTspice-RIAA-simulation not working out
I remember old vinyl pop-click, pop-click records.
The same curve appears at
https://sound-au.com/project06.htm .
- 2,149
1
vote
How to disable Bluetooth temporarily for line in to work in mini hifi amplifier TDA7492P?
How can I disable bluetooth temporarily for line in to work?
It appears that you can't. Also this amp has no line in.
Googling for 'tda7492p bluetooth amplifier board manual' shows that the 3.5 mm ...
- 2,520
1
vote
Switching stereo input between three stereo outputs
Just to be sure you've got the right switch, it should have 8 contacts / terminals in two groups of 4. In each group of 4 there will be 3 input contacts (call them A,B & C) and one output which ...
- 1,400
1
vote
Accepted
Power supply noise reduction
To understand any filter design you need to have expectations of what is signal, noise, SNR, voltage, current, and Impedance in terms of amplitude and f. Then we can ask some better questions. But ...
- 133k
1
vote
Cheap Audio Equalizer board converted to seperate outputs
The schematic shows how graphic equalizers (when not digital signal processing) are generally constructed. There's no places in the circuit where one could tap a single band.
The principle is an ...
- 21.1k
1
vote
Cheap Audio Equalizer board converted to seperate outputs
The opamps in this circuit are being used as gyrators, they basically transform a capacitance into an inductance that is then in parallel with another capacitance to form a resonant circuit.
The ...
- 3,386
1
vote
How does adding a tweeter electrically affects the main driver?
so my question is whether adding these simple items in parallel can somehow affect the low frequencies too?
Unlikely.
I guess the capacitor and tweeter offer another current path for high frequency ...
- 16.4k
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