sound quality
Posted: Mon Feb 11, 2013 8:40 pm
I have a small quality problem here. Sound quality at low volume levels, but audible enough to be painful.
In zip is one cycle modulated sine wave attached, for the reference what I talk about.
One channel is original -50dB, other one is normalized so that you can hear.
The same problem is in both, FS and SM (tested on exe, soundcard output is 16bit).
The same problem is with static tones too; modulation emphasizes difference at various levels.
The same problem is with built-in sine and with wavetable with loaded sine.
The problem is less noticable at higher levels (but is audible), which suggests that this is not the oscillator problem.
At higher frequencies, and at such type of modulation, cross-zero glitchess seem to appear.
Problem becomes not greater after scaling the volume down and up again in FS.
You may need better headphones (used on studio monitors)
The design is simple. 1) oscillator, 2) multiplier for gain, 3) out.
And here is my question.
Is this quality issue related to 16-bit resolution of playback/files?
Or is it related to 32-bit procesing in SM/FS?
What and how can be done about that in FS?
How to approach it, to improve the sound quality?
In zip is one cycle modulated sine wave attached, for the reference what I talk about.
One channel is original -50dB, other one is normalized so that you can hear.
The same problem is in both, FS and SM (tested on exe, soundcard output is 16bit).
The same problem is with static tones too; modulation emphasizes difference at various levels.
The same problem is with built-in sine and with wavetable with loaded sine.
The problem is less noticable at higher levels (but is audible), which suggests that this is not the oscillator problem.
At higher frequencies, and at such type of modulation, cross-zero glitchess seem to appear.
Problem becomes not greater after scaling the volume down and up again in FS.
You may need better headphones (used on studio monitors)
The design is simple. 1) oscillator, 2) multiplier for gain, 3) out.
And here is my question.
Is this quality issue related to 16-bit resolution of playback/files?
Or is it related to 32-bit procesing in SM/FS?
What and how can be done about that in FS?
How to approach it, to improve the sound quality?