I see...
So, would it be possible to use a computer with JRiver, a USB-to-I2S card like the one below, to the piano DAC, and use the crossover to send 200Hz and above to a fullrange driver, and the stereo subs for the lower range?
WaveIO | Luckit
So, would it be possible to use a computer with JRiver, a USB-to-I2S card like the one below, to the piano DAC, and use the crossover to send 200Hz and above to a fullrange driver, and the stereo subs for the lower range?
WaveIO | Luckit
An externally hosted image should be here but it was not working when we last tested it.
First Volumio images for Piano 2.1
http://updates.volumio.org/pi/volumio/2.027/volumio-2.027-2016-11-17-pi.img.zip (RPI)
http://updates.volumio.org/sparky/volumio/2.029/volumio-2.029-2016-11-18-sparky.img.zip (Sparky)
http://updates.volumio.org/pi/volumio/2.027/volumio-2.027-2016-11-17-pi.img.zip (RPI)
http://updates.volumio.org/sparky/volumio/2.029/volumio-2.029-2016-11-18-sparky.img.zip (Sparky)
Re-route 3.3V from rPi?
Can work, if i re-route 3.3V (Pin1 and Pin17) from rPi to DAC?
I have 2 DACs in drawer which, seems can work in Slave mode but requires 3.3V to operate.
Can work, if i re-route 3.3V (Pin1 and Pin17) from rPi to DAC?
I have 2 DACs in drawer which, seems can work in Slave mode but requires 3.3V to operate.
grr... I found some problems on DSP flows...LPF has a problem (wrong filter , wrong pole)
Monday we will release the new DSP flows.
Monday we will release the new DSP flows.
It's working great on my ancient RPi B+!
Listening on 2.0 mode.. will try to move the setup to the living room to try 2.1.
Attachments
Could you tell a liitle more about the filter design, please? If I select low-pass of 60Hz there will be set a high pass filter of same frequency to the main-output?
What is the filter type you are using (type and steepness)? Is there an option to set a delay between subwoofer and main outputs?
What is the filter type you are using (type and steepness)? Is there an option to set a delay between subwoofer and main outputs?
Yeap works well with 2.0 , not so great with 2.1 and 2.2...
It's working great on my ancient RPi B+!
Listening on 2.0 mode.. will try to move the setup to the living room to try 2.1.
Once a frequency is chosen both LPF and HFH will use it a cutoff frequency .
We are using a 4 pole LR filter...I did not see any delays options
We are using a 4 pole LR filter...I did not see any delays options
I can confirm DAC are started to work when patched 3.3V from rPi's pin1 and pin17 to DAC's.
But strange that only works until no change in sample rate.
Get stucked into Flac 24/88,2 file after played example 24/192 .
And same when swithed from 24/96 to 16/48.
piCorePlayer 3.02 in use with HifiBerry DAC+ or IQaudIO DAC+, in slave mode.
But strange that only works until no change in sample rate.
Get stucked into Flac 24/88,2 file after played example 24/192 .
And same when swithed from 24/96 to 16/48.
piCorePlayer 3.02 in use with HifiBerry DAC+ or IQaudIO DAC+, in slave mode.
Thx for answering AND confirming it works ok.
Interesting on the Sample Rate change issues.
I've been running a HFBD+P some on a Kali in slave mode, but I haven't played anything but my CD rips. I'll be putting it back into the system again tonight or tomorrow and will try some material with other sampling rates then
and see if I get similar hiccups.
BTW, feeding the 3.3v from the Pi is not the way to get the best SQ out of that setup. That bypasses all of the noise filtering that the good people at Allo.com put on the Kali, especially if you are powering it separately from the Pi.
Instead use a 3.3v LDO (Low Dropout) regulator fed from the 5v pins. One of the inexpensive EBay or Vendor's Bazaar ones using an ADM715x, LT3042 or TPS7A4700 regulator would be best, but even one using an LT3080 or similar would be MUCH better than using the noisy 3.3v off the Pi.
Greg in Mississippi
Interesting on the Sample Rate change issues.
I've been running a HFBD+P some on a Kali in slave mode, but I haven't played anything but my CD rips. I'll be putting it back into the system again tonight or tomorrow and will try some material with other sampling rates then
and see if I get similar hiccups.
BTW, feeding the 3.3v from the Pi is not the way to get the best SQ out of that setup. That bypasses all of the noise filtering that the good people at Allo.com put on the Kali, especially if you are powering it separately from the Pi.
Instead use a 3.3v LDO (Low Dropout) regulator fed from the 5v pins. One of the inexpensive EBay or Vendor's Bazaar ones using an ADM715x, LT3042 or TPS7A4700 regulator would be best, but even one using an LT3080 or similar would be MUCH better than using the noisy 3.3v off the Pi.
Greg in Mississippi
...@Greg Stewart -- replying from the Mambo thread... didn't want to go far off-topic there anymore...
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😀 I happened to breeze by there, just done researching that (D+PRO/Piano) & replied there-- was gonna post here also, to get your guys thoughts, just busy.
Post #35:
Allo KALI Reclocker & Raspberry Pi DACs running as Slave or Master? - Page 4
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😀 I happened to breeze by there, just done researching that (D+PRO/Piano) & replied there-- was gonna post here also, to get your guys thoughts, just busy.
Post #35:
Allo KALI Reclocker & Raspberry Pi DACs running as Slave or Master? - Page 4
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Ok, i understand maybe not the ideal to supply back to DAC from rPi the 3.3V, but i have not wanted to add anything to this setup.
These are planned to use as secondary setups, main is with Soekris Ladder DAC.
Anyway, this seems some kind of buffering issue...as now checked, situation gets better, but KALI many times get out of sync, sometimes cannot even start new song. Repowering solve issue for a while.
These are planned to use as secondary setups, main is with Soekris Ladder DAC.
Anyway, this seems some kind of buffering issue...as now checked, situation gets better, but KALI many times get out of sync, sometimes cannot even start new song. Repowering solve issue for a while.
I was thinking about this and my earlier request for unusual slopes/frequencies....
LR4 HP/LP will give you the cake in terms of sat/sub integration.
If you want the icing on it you need to compensate for the rolloffs of the subs and satelites! This is not difficult (in DSP) you need to add a 2nd order zero in the LPF and a 2nd order zero in the HPF. As long as the user can choose the frequency to match the rolloffs of his speakers this will provide more accurate integration and most importantly... better sound!
This will benefit all users. I have heard the difference it makes and it's very worthwhile (in all honesty, I compensate for the satelite rolloff but my subs go up fairly high, so don't get compensated).
The reason for choosinge 2nd order: works perfectly with closed box speakers, if you have ports block them and compensate for the higher/shallower rolloff (my speakers go from 48Hz rolloff 4th order to 80Hz 2nd order when the fart hole is blocked).
If you want a cherry on the icing on the cake, add a notch filter in the LP at the main room mode frequency (in my case 35Hz). You only need to subtract a few dB, not try to compensate for the entire room gain.
If all the above is done, the improvement in bass "correctness" will be profound. And the beneifts of the clean bass benefit the entire frequency range in terms of clarity, coherence and..well... just everything!
So in summary. My request is that you add the following to your LR4 slopes:
2nd order zero in the LP (user selectable freq)
2nd order zero in he HP (user selectable freq)
Notch filter in the LP (user selectable freq)
Cheers,
Dave
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The only problem is that DSP cycles are rather limited in the DAC IC..
If you want to see the capabilities and limitations please download purepath software and it give you can see if the cycles are enough..
If you want to see the capabilities and limitations please download purepath software and it give you can see if the cycles are enough..
150Hz is quite low in case of a FAST system - I would like to have up to 500Hz in my system..
@Dave: I do not understand what you mean with roll off. You take the LR4 filter and add a LR2 filter to do what?
A closed box satallite should get a LR2 LP to add it with a sub that is filtered with 48dB LP already or no add. DSP filter when the sub gets a LR2 only. So I agree it would be fine to choose between 0, 12dB or 24dB filters for HP and LP separately. The best sum signal you get with a time alignment between them - but delay seems not to be possible...
I have another problem with my Kali and Piano 2.1 on RPi3, all powered via lateral Kali 2-pin connector (Aroio SW player). Sometimes it takes 4 trials to get it booted correctly. Allthough the player is working and Kali is blinking blue, there is no sound coming from the DAC. What problem could this be? Seems to be related to DAC..😕
@Dave: I do not understand what you mean with roll off. You take the LR4 filter and add a LR2 filter to do what?
A closed box satallite should get a LR2 LP to add it with a sub that is filtered with 48dB LP already or no add. DSP filter when the sub gets a LR2 only. So I agree it would be fine to choose between 0, 12dB or 24dB filters for HP and LP separately. The best sum signal you get with a time alignment between them - but delay seems not to be possible...
I have another problem with my Kali and Piano 2.1 on RPi3, all powered via lateral Kali 2-pin connector (Aroio SW player). Sometimes it takes 4 trials to get it booted correctly. Allthough the player is working and Kali is blinking blue, there is no sound coming from the DAC. What problem could this be? Seems to be related to DAC..😕
Maybe I did not explain it well, here's another way to look at it...
#1 Flatten the response of the satelite speaker by adding the inverse of their LF rolloff (2nd order for closed box)
#2 Flatten the response of the subs by adding the inverse of their HF rolloff (2nd order?, better than nothing!)
After #1 and #2 you have ideal drivers which will sum ideally with a "normal" LR4 crossover.
Note: IMO don't waste your time with one sub. This approach needs two and they need to the same distance away from the listener as the satelites - then you don't need any delay.
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