Open-source USB interface: Audio Widget

[parisnight]

In the audio-widget branch, the latest update adding revised VID/PID into WidgetControl was two months ago. The latest update adding the productid4=0x3e9 into widget-control.c was seven months ago.
It looks like widget-control.c may not be in sync, but I'd leave final analysis to Alex or Borge.

[lm1no2]

I testet about 4 hours on Windows 7 and no problems. The converter works perfectly, especially with external DAC. Any info about new version with galvanic isolation ?

[Catal]

Hi,
I'm amazed by a change in the Widget Control.

Has someone tried iir filter instead of fir one?
With the AB 1.2 and AK4430 dac it seems to me it improves bass deepness and articulation and trebles become more polite and focused.
Distortion seem to be a lot less.

For me it's a lot better than with fir filter.

Frank

[UnixMan]

Good to know, thanks.

Though the preferred setting may be subjective and/or depending on the context (remaining of the audio chain, room, recordings, etc). If you have an AB-1.2, don't forget to try both settings to find out... and let us know about your experiences.

[Catal]

I've used Fir filter since the beginning.
Then I did some mods:
- two LifePO4 supplies for the Xos
- three crcrc linear supplies and three Salas shunt regulators for 3,3v and 5v
- Mkp bypassed with teflon cap in the LPF filter
- Dale resistors rn55 in the LPF filter
- Dale resistors rn55 in the I2s lines

Sound has improved a lot with IIR filter.

This is my setup:
Headphone____Laptop - Jplay SW - Violectric V200 - Rudistor Chroma MD1 and AKG701.
Speaker____Laptop -Jplay SW - B4 Preamp - Ncc200 Amp dual mono - Audio Physic Brylon - Cabasse Santorin25

Test has be done with classical and jazz.

Frank

[borges]

Interesting stuff with the regulators! Do you have schematics to share?

The fir/iir setting shouldn't be doing anything on the AB-1.2. The AK4430 doesn't have a filter selectr input. The functionality was put in for the PCM5102 of the AB-1.12 prototype.

I doubt the fir/iir setting does anything else in firmware, but I'll have to check to verify.

Børge

[Catal]

For example sound doesn't improve when I change filter and use AB 1.1 with the ES9022 ( I have also to change usb receiver with later one).

I've asked in the forum to verify if " I'm crazy or not" :-))
I know this setting should do anything to the sound but I can hear clearly an improvement with iir and AK4430 dac.

Can you try with your setup?
Frank

[Catal]

As regards schematic, I'll post this evening from home.

Frank

[1audio]

Originally Posted by Catal

Hi,
I'm amazed by a change in the Widget Control.

Has someone tried iir filter instead of fir one?
With the AB 1.2 and AK4430 dac it seems to me it improves bass deepness and articulation and trebles become more polite and focused.
Distortion seem to be a lot less.

For me it's a lot better than with fir filter.

Frank

Where is the filter you are talking about? The AK4430 has no filter options.

[Catal]

It's the filter setting in the widget control software.

As I said to Borges, I know that this selection is "only" possible for the PCM5102 dac, ... cause AK4430 datasheet says clearly that only fir filter can be used, ... that I should hear no difference between these two options.

Frank