BDA-3 DAC

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James Tanner

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Re: BDA-3 DAC
« Reply #1160 on: 12 Feb 2019, 01:58 am »
James I've just bought a streamer forgetting my BDA-3 only has one Coax input-would there be any downside using an adaptor from Coax to BNC?

Should be fine


mav52

Re: BDA-3 DAC
« Reply #1161 on: 12 Feb 2019, 01:57 pm »
Hey James , any update on the GUI for changing/selecting filters

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Quote from: mav52 on 11 Jan 2016, 06:20 am

    I'm interested in knowing if the 5 filters that are in the AKM 4490 are user accessible in the BCD-3.

    From the AKM4390 spec."

    "Five digital filters are integrated into the AK4490: a short delay, sharp roll-off filter and a short delay, slow roll-off filter for minimum delay, a sharp roll-off filter and a slow roll-off filter for no phase shifting, and newly integrated super slow roll-off filter with emphasized characteristics provide a wide range of choice in digital filters. " http://www.akm.com/akm/en/aboutus/news/20140501AK4490_001/?link_id=link109

     if so talk about flexible


Not currently but in the future we will have a GUI to allow it.

james  "

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James any update on this ? 


« Last Edit: 14 Feb 2019, 02:50 pm by mav52 »

James Tanner

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Re: BDA-3 DAC
« Reply #1162 on: 14 Feb 2019, 04:28 pm »
Hi

No sorry we have not had much call for it so have not spent a lot of time on it so far.

james


greyscale75

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Re: BDA-3 DAC
« Reply #1163 on: 14 Feb 2019, 05:42 pm »
Am about to pull the trigger on a BDA-3. A question arises, how to tune internet radio stations? I own (but dont use JRMC). Any ideas?.
Thank You.

BSC

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Re: BDA-3 DAC
« Reply #1164 on: 17 Feb 2019, 05:01 pm »
James any changes of view on MQA and the BDA-3 ?

James Tanner

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Re: BDA-3 DAC
« Reply #1165 on: 17 Feb 2019, 06:03 pm »
James any changes of view on MQA and the BDA-3 ?

Hi

No change at our end.

james


Pundamilia

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Re: BDA-3 DAC
« Reply #1166 on: 18 Feb 2019, 05:13 am »
 :thumb: :thumb: :thumb:

RobL

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Re: BDA-3 DAC Digital Filters
« Reply #1167 on: 20 Apr 2019, 02:59 am »
Hey James , any update on the GUI for changing/selecting filters

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Quote from: mav52 on 11 Jan 2016, 06:20 am

    I'm interested in knowing if the 5 filters that are in the AKM 4490 are user accessible in the BCD-3.

    From the AKM4390 spec."

    "Five digital filters are integrated into the AK4490: a short delay, sharp roll-off filter and a short delay, slow roll-off filter for minimum delay, a sharp roll-off filter and a slow roll-off filter for no phase shifting, and newly integrated super slow roll-off filter with emphasized characteristics provide a wide range of choice in digital filters. " http://www.akm.com/akm/en/aboutus/news/20140501AK4490_001/?link_id=link109

     if so talk about flexible


Not currently but in the future we will have a GUI to allow it.

james  "

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

James any update on this ?


I’ve studied the BDA-3 circuit board design visually. Pins 6,8 and 9 on the AK4490 control the digital filters.  It appears to me they are hardwired for one filter response: it appears they chose Super Slow Rolloff.

James Tanner

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Re: BDA-3 DAC Digital Filters
« Reply #1168 on: 20 Apr 2019, 01:18 pm »

I’ve studied the BDA-3 circuit board design visually. Pins 6,8 and 9 on the AK4490 control the digital filters.  It appears to me they are hardwired for one filter response: it appears they chose Super Slow Rolloff.

Hi Rob

The AK4490 is setup for software control,  not hardware control.

The commands to change the filters are a function of software changes not hardware.

The default digital filter used is 'Short Delay,  Sharp Roll-off'

James

John Donaldson

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Re: BDA-3 DAC
« Reply #1169 on: 5 May 2019, 03:20 pm »
Does the BDA-3 continuously draw power from the USB bus or only for an initial handshake?

James Tanner

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Re: BDA-3 DAC
« Reply #1170 on: 6 May 2019, 10:43 am »
Does the BDA-3 continuously draw power from the USB bus or only for an initial handshake?

Hi John

The USB bus in the BDA3 is self-powered and does not draw any power from any attached USB device.

james


todd95008

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Re: BDA-3 DAC
« Reply #1171 on: 9 May 2019, 05:22 am »
Just got my BDA-3.
I find the LED brightness quite distracting.
Any way to dim these ?

Also, I Did not know you could get with blue LED's (until looking here) but those are probably too bright as well.
The blue LED is blue/red (magenta for amber I guess) ?

Thanks
Todd

The Rang

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Re: BDA-3 DAC
« Reply #1172 on: 10 May 2019, 01:36 am »
None of the LEDs are red that I’ve noticed.
In certain circumstance a couple have been kind of pink, like the blue and red are mixed.
Bright?
Maybe, but with my other gear also having blue (or blu-ish) lights the BDA3 fits in great

todd95008

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Re: BDA-3 DAC
« Reply #1173 on: 10 May 2019, 02:52 am »
Don't know about the blue version but the green/red version is too bright.
The standby red LED is 2x brighter than other similar LED's on my other equipment.
When power is On and there are 4 green LED's it is too much.
Hopefully James Tanner has a fix.

Todd

James Tanner

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Re: BDA-3 DAC
« Reply #1174 on: 10 May 2019, 10:55 am »
Don't know about the blue version but the green/red version is too bright.
The standby red LED is 2x brighter than other similar LED's on my other equipment.
When power is On and there are 4 green LED's it is too much.
Hopefully James Tanner has a fix.

Todd

Hi Todd

Never heard this before but contact Mike at Bryston - I think there is a way to reduce the output intensity.
mpikett@bryston.com

james

Hoiman

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Re: BDA-3 DAC
« Reply #1175 on: 10 May 2019, 03:41 pm »
Quote
I think there is a way to reduce the output intensity.

O please let us all know.

James Tanner

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Re: BDA-3 DAC
« Reply #1176 on: 10 May 2019, 04:15 pm »

ngamountains

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Re: BDA-3 DAC
« Reply #1177 on: 10 May 2019, 07:06 pm »
Talk about your first world problems. James, if this is what people are complaining about, you’re doing alright.

todd95008

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Re: BDA-3 DAC
« Reply #1178 on: 12 May 2019, 08:14 pm »
Talk about your first world problems.

Yes, a minor issue and I have a slight fix for it anyway.
I forgot that long ago on my BDA-1, I removed the connections to the power LED.
The power LED is really not necessary since one of the input LED's will always be On if power is On.
I was used to just 3 green LED's when power is On and locked to a signal.

With the BDA-3 I found a simpler solution.
I removed the front panel circuit card and just put a small piece of black electrical tape over the hole in the front panel hole where the power LED is.
This is the inside of the Aluminum front panel !
The LED's do not go into the front panel hole like they did on the BDA-1.
They are surface mount LED's that each has its own little foam pocket to block light from any adjacent LED.

Was about a 10 minute job total and if I ever want to go back this is easily reversible.
Now with only 3 green LED's when locked, it is not so bright.

I will be posting more comments on the operational quirks and sound of the DAC over the next week.
Before that I do have one question.
Why does Bryston state that the inputs are galvanically isolated when this is not the case ?
On both my BDA-1 and the BDA-3 the coax inputs are transformer coupled but the ground return is NOT isolated !

Todd

James Tanner

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Re: BDA-3 DAC
« Reply #1179 on: 12 May 2019, 09:29 pm »
Hi Todd

The coax ground return is connected to chassis ground, not system ground.

James