Twisted Pear Audio Support
»
Product Support
»
Digital
»
Buffalo DAC
»
BII at least damaged maybe faulty: Reverse fix possible?
Rank: Member
Groups: Member
Joined: 8/10/2015(UTC) Posts: 27  Thanks: 7 times
|
Ok thanks,
I guess v1.1 is almost nothing visible?
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 8/10/2015(UTC) Posts: 27 Thanks: 7 times
|
Btw, do you guys mind my asking if the Otto II switch can switch by itself and also forced with an external switch at the same time? Can't find a manual.
I have 2 spdif sources, one send signal all the time even digital silence and the other shut off with no signal. So i don,t want it to switch on the silent one when not needed. Thanks!
|
|
|
|
|
|
Rank: Administration
Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 2,868
Location: Massachusetts, USA
Thanks: 2 times
Was thanked: 141 time(s) in 134 post(s)
|
Do you mean, will the OTTO detect a signal and switch automatically? No.
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 8/10/2015(UTC) Posts: 27 Thanks: 7 times
|
Strange I did not get any notification for your reply, anyway, thanks Brian. New question to keep you busy guys, I want to write down the attenuation scale of the Volimuite on my DAC's front face. What is it please, if possible in -dB on a linear scale (the rotation of the Volumite's knob). Thanks! Matthieu, enjoying my DAC for a lifetime I hope, best one ever heard around. Edit: homework done, -63.5dB with 0.5dB steps up to 0dB? Right? Edited by user Saturday, August 19, 2017 6:32:03 PM(UTC)
| Reason: Not specified
|
|
|
|
|
|
Rank: Administration
Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 2,868
Location: Massachusetts, USA
Thanks: 2 times
Was thanked: 141 time(s) in 134 post(s)
|
Quote:-63.5dB with 0.5dB steps up to 0dB? Right? Correct
|
 1 user thanked Brian Donegan for this useful post.
|
|
|
|
Rank: Member
Groups: Member
Joined: 8/10/2015(UTC) Posts: 27 Thanks: 7 times
|
Hi there,
hope I'm not in the archeotecnologist crowd now with my BII ;)
new questions:
• on a Placid 2.0.1, is my 0.5V PP ripple at C1 normal even if I now have a 5600uF cap? It's a 16V Panasonic FC and DC is 12.7V there. And original BOM was 1000uF... Cap failure or normal behavior because of high current used?
I was concerned about voltage here for reliability purpose (16V rated cap here so 25% headroom with the 12.7V, safe enough I guess). I want my BII to last for ever and upgrade things where I can. Planning a 105°C 5000h Panasonic FR for C5.
• my Voluminte gives no volume change at all between lower position, around 6:30, and up to 9:30, like the 5k was damaged. Thee should be some dB more there, and as it was a used and badly build kit I got, can an overheated soldering process have damaged the 5k linear pot?
Thanks!
|
|
|
|
|
|
Rank: Member
Groups: Member
Joined: 8/10/2015(UTC) Posts: 27 Thanks: 7 times
|
Originally Posted by: Brian Donegan  Quote:-63.5dB with 0.5dB steps up to 0dB? Right? Correct BII integration manual wrote:
I was looking for the same with the BIIIPro, but found that for the BII:
Volume control in the DAC
The ES9018 chip has a well designed volume control mechanism built into the chip. The ES9018 has a DSP section that uses 48 bits internally for all important operations. So even with a 32-bit signal there is some precision left for digital attenuation of the signal.
The output volume is set by registers in the DAC, ranging from 0 to -127dB, in 0.5 dB steps. The Volumite simply sets the volume registers in the DAC using I2C. So the pot is not in the signal way, it is just a means of measuring the desired attenuation. A change of output volume is done gradually: internally the DAC adjusts the volume in steps of less than 1/64 dB, so the unit smoothly changes it’s output signal from the old setting to the new one.
Nice I have not done my volume scale on my DAC! Don't remember where's that -63.5dB was from... So what's the real deal guys? Both ES9018 and ES9029 please. BTW, as when I adjust volume full down I still got some music I think something's wrong somewhere... Thanks! Edited by user Friday, October 26, 2018 8:40:07 PM(UTC)
| Reason: Not specified
|
|
|
|
|
|
Rank: Administration
Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 2,868
Location: Massachusetts, USA
Thanks: 2 times
Was thanked: 141 time(s) in 134 post(s)
|
We only go down to -64 in the firmware, since more than that is wasted pot travel, and makes the usable range too small. If you want it quieter than that, we figure just hit pause 😀
|
1 user thanked Brian Donegan for this useful post.
|
|
|
|
Rank: Member
Groups: Member
Joined: 8/10/2015(UTC) Posts: 27 Thanks: 7 times
|
Thanks Brian!
You are right from -127 to -64dB it's... useless ;) Nice you did the same with the Pro BIII.
|
|
|
|
|
|
Twisted Pear Audio Support
»
Product Support
»
Digital
»
Buffalo DAC
»
BII at least damaged maybe faulty: Reverse fix possible?
Forum Jump
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.
