Signalyst DSC1

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wengtech

wengtech

Member
Joined 2012
For NXP ICs 74AHCT595D vs 74HC595D the main differences are:
1. Maximum frequency SHCP / STCP: 170MHz vs 50MHz
2. HIGH-level input voltage: 2V vs ~3V (74HC595D is less stable with a 3.3V Input logic level signal)
3. Different power consumption

Sincerely, Alexey Galkin.
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okay thanks.

but how about the effect to sound?
if 74HC595D can be use, it will far cheaper than AHCT
 
V

Vit123

Member
Joined 2017
Ipoci said:
Are there any measurements that shows the behaviour of DSD64, DSD128, DSD256 and DSD512? I'm not looking for any special, just curious to understand if I need to invest in hardware capable to push up to higher DSD rates or remeins calm with lower profile Pc ... :D
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The only measurements I've seen was done by Jussi Laako with DSC 2.5. His recommendations, based on measurements, was DSD256 as a "sweet pot" for DSC 2.5.

With HQP I've tried DSD256 and DSD512. My opinion (quite subjective):
1. DSD512 is better then DSD256 with the same filter+modulator. The difference is not big, but quite noticeable, even in blind tests. More "analog" sound, I'd say.
2. Full-length filters in HQP (poly-sinc-xtr (-mp), closed-form, poly-sinc (-mp) ...) is MUCH better then -2s or -shrt (short) filters. The difference is audible at once and very big.

So, the reasonable solution is in using poly-sinc-xtr (-mp), closed-form, poly-sinc (or other full filters) in DSD256. Very high SQ.
My old I7-8700 with fast DDR4 did it (computer cost ~ 1500 USD). Don't forget SoC as NAA. I am with Odroid C2 for now.

To handle DSD512 with poly-sinc-xtr (-mp) and closed-form you'll need much more power. Cost will be 3 times more.

If you won't invest to a new computer, try offline upsampling by using Saracon (up to DSD128) or AUL converter (up to DSD1024). I slightly prefer the last one.
Aleksey Galkin says that has got a very good results with special version of foobar + sox resampler + ASIO Proxy.

But bear in mind - all are very subjective :)
 
wengtech

wengtech

Member
Joined 2012
is that between XLR pin 1 and T1 pin 4 should be connected to ground?
at this schematic it look like they are floating, no ground.
:confused:

thanks.
 

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HiddenPilot

Member
Joined 2015
mcluxun said:
For DSC 2.5.2, do I still have on board 3.3v if I use external 5V psu?
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A little information update about DSC 2.5.2/2.6.2 voltage power supply.

DSC 2.5.2 needs 2 supply voltages: 5V and 3.3V

5V are required for powering 74AHCT595 and are connected via external power connectors/internal LDO (Read user guide).

3.3V are used to power the service logic and are come in through the pins of the Amanero connector (i.e., powered by Amanero LDO).
 
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