On 15/03/2014 1:46 AM, Richard Dobson wrote:
But portaudio only states the software i/o buffer latency, it knows
nothing directly of internal codec latencies. You would need to subtract
the (two-way?) buffer latency portaudio reports, and then measure or
compute how much of the remainder is down
I've ordered these for my musical digital processing activities:
http://www.diyinhk.com/shop/audio-kits/49-isolated-xmos-384khz-high-quality-usb-to-i2s-pcb-with-ultralow-noise-65uv-regulator.html
http://www.diyinhk.com/shop/audio-kits/31-384khz32bit-pcm5102a-dac-i2s-input-ultra-low-noise-regulat
For my own interest, it suffices to start with this:
Opamp(-->filter)-->AD-->Fast-low-latency(+big-memory)-DSP-->DA-->buffer/filter(
withnot too much effect in 20Hz-20kHz)
as a generality, and such high frequency, and (like I proposed) such
accurate convertors that I'd be going from 5xCD sa
On 2014-03-14, Olli Niemitalo wrote:
Not sure what's going on at the lowest bass frequencies, as the peak
there could be a measurement artifact.
I'm guessing that's just the minimum phaseness of the kernel intruding.
Remember, for a minimum phase filter the phase response equals the log
Hilb
On Fri, Mar 14, 2014 at 4:46 PM, Richard Dobson
wrote:
> On 14/03/2014 14:27, Olli Niemitalo wrote:
>>
>> http://yehar.com/Fast%20Track%20Ultra%2048%20kHz%20output-input%20ir.jpg
>>
>> It looks more like a minimum-phase lowpass filter. The marker at
>> sample #29 indicates what PortAudio thinks th
On 14/03/2014 14:27, Olli Niemitalo wrote:
(I tried to send this earlier with images but forgot that attachments
are not allowed.)
I recently found out that not all codecs / sound cards use symmetrical
sinc-type filters in their ADC's / DAC's. This is the output-->input
impulse response of my M-
(I tried to send this earlier with images but forgot that attachments
are not allowed.)
I recently found out that not all codecs / sound cards use symmetrical
sinc-type filters in their ADC's / DAC's. This is the output-->input
impulse response of my M-Audio Fast Track Ultra sound card:
http://ye
Ethan Duni wrote:
And an AD converter with 2.5 MS/S and 24 bits accuracy sigma delta ...
Also notice that that one doesn't claim 24 bit accuracy. The SNR/dynamic
range specs work out to about 16 bits accuracy at the highest sampling
rate, ...
Sure, but you can, in this case, add a nice very l
>>
>> And an AD converter with 2.5 MS/S and 24 bits accuracy sigma delta which
should be great for measurements and undisputably great sampling behavior
for perfect delay lines, etc.:
>>
>>
http://www.analog.com/en/analog-to-digital-converters/ad-converters/ad7760/products/product.html
>> (eval b
On 12 Mar 2014, at 15:53, Theo Verelst wrote:
> A DA converter with 20 bits (actual) accuracy, pretty low noise, and a
> settling time of 1 microsecond, driven by more or less standard 3 wire
> interface:
> http://www.analog.com/en/digital-to-analog-converters/da-converters/ad5791/products/pro
Hi all
Since I was into synthesizers and effects, I found it interesting to
have an idea about what would sound good on stage. I had amplified
various mixes of (analog) microphones at (high) school, so I knew it was
possible to place them and chose subtle signal improvements to make
stage pl
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