The synthesizer tag has no wiki summary.
1
vote
1answer
69 views
Twin T circuit noisy
I've been fiddling with a twin-T percussion oscillator with success. It's built on a breadboard and it sounds exactly how it should sound (damped sine wave, big 808/909-kind of kicks). However it's ...
2
votes
2answers
92 views
Efficient way to get multiple Analogue voltages out of a microcontroller?
I've read in my research that most microcontrollers are not built with DAC outputs as they are expensive to include on silicon chips. Also applications that require analogue outputs typically need a ...
2
votes
1answer
317 views
Quartus II ignoring synthesis attribute noprune
There is a register in my design that I am using for debug purposes with zero fan-out. Since it isn't driving any logic, the synthesizer optimizes it away. However, as far as my knowledge goes, ...
6
votes
2answers
143 views
Is there any VHDL 93 or 2002 code that is incompatible with VHDL 2008?
Is there any VHDL 93 or 2002 code that is incompatible with VHDL 2008?
In other words, if I have a bunch of files made for older vhdl standards, will a 2008 simulation/compilation work just fine?
...
6
votes
3answers
839 views
What is the simplest sound generating circuit?
I'm relatively new to electronics, and have no formal training other that what I picked up through my electrical engineer father. I solder well, can read schematics, have assembled kit projects with a ...
4
votes
6answers
466 views
Design for an analogue oscillator that doesn't drift in frequency?
VCOs (Voltage Controlled Oscillators) in analogue music synthesizers are notorious for drifting with temperature. What design solutions are there for an analogue audio VCO that keeps close (as in ...
1
vote
1answer
128 views
How do you output a frequency/note with a 1V octave keyboard controller?
To be specific, I made this:
from here
And to test the CV output, I used this schematic:
from here
It works as a oscillator. Every time I hit a key it will oscillate at that note, but it wont ...
2
votes
2answers
483 views
Arduino Piezo Knock Sensor Synth
I would like to create a synthesizer using 20 separate piezos for the triggers. In other words, each piezo would trigger a separate tone.
At the very least I would like to know if connecting 20 ...
1
vote
3answers
308 views
Are there any viable sound IC's in older consumer PC sound cards/modems for diy/circuitbending?
I watched some diy synthesizer vids on youtube, mostly APC's, and I thought since most use the 556/555's, what if we used something different. As fun as buying kits are, sometimes, we are broke, but ...
2
votes
3answers
397 views
Which are the the valid VHDL compiler pragmas?
I know you can stop VHDL code from being compiled by the synthesizer:
-- pragma translate_off
assert thisDoesNotGetSynthesized();
-- pragma translate_on
BUT, ...
8
votes
2answers
263 views
Why do frequency synthesizers often use N/N+1 prescalers?
Frequency synthesizers, like Analog's ADF411x often have prescalers in their PLL which divide by 16/17, 32/33 or 64/65? What's the 2^N+1 value used for?
8
votes
4answers
360 views
Building a synthesizer with no prior experience
I've got an extensive music background and have been infatuated with synthesizers since I was young. I had dreamed of going into an EE program to make my dream a reality, but I couldn't afford school ...
