SPARKY FORUM

Recent Posts

Pages: [1] 2 3 ... 10
1
Dear Anand,


   On Volumio, if the volume is changed in the GUI, it changes both digital & subwoofer volumes together. You can verify using alsamixer cmd.

We are working on OSMC to support Piano 2.1 DAC, will be available in a weeks time.

With Regards
Sparky Admin

2
PIANO HI-FI DAC 2.1 / Re: Need help with pianoDAC 2.1 SubWoofer configurations.
« Last post by anand on June 13, 2017, 02:20:03 AM »
Hello,
     Can you please tell me how to increase the subWoofer gain in Volumio OS? Also we need a mediacenter that is capable of playing video as well. Will OpenELEC be compatible with pianoDAC 2.1?
     Also if pianoDAC 2.1 is not compatible with OSMC, kindly remove it from the list of supported OS's(https://www.allo.com/sparky/piano-dac-2-1.html).
3
Dear Anand,

    Currently Piano 2.1 is not supported in OSMC. You can use volumio or max2play image.

If your are using max2play you need to change sub woofer volume in alsamixer.

With Regards
Sparky Admin
4
PIANO HI-FI DAC 2.1 / Need help with pianoDAC 2.1 SubWoofer configurations.
« Last post by anand on June 12, 2017, 06:12:37 AM »
Hi All,
     Our mediacentre setup is composed of Raspberry PI3, Piano DAC 2.1 and two Volt amp+ amplifiers. We need to have a fully functional 2.1 channel audio station. We have tried two different osís namely the volumio OS and OSMC.
     Firstly for the volumio OS we have followed all the necessary steps and finally got the setup  working. But the audio from subLEFT/subRIGHT channels were barely audible(low gain). Even after trying different cut off values the audio remained the same. After that we have installed OSMC os. This time the audio from subLEFT/subRIGHT were the same as LEFT/RIGHT channels. We have used different configurations and cutoff values to no avail.
    We tried the firmware bin files provided in the github page (https://github.com/allocom/piano-firmware). It didnít work.  We saw some users creating firmware files for different dsp configurations based on a manual (https://www.allo.com/documents/sparky/Piano-DAC-Purepath-Process-Flow.pdf). Is it a necessity to manually use the bin files? Can you please tell the proper way make the setup(2.1) work with OSMC os?

Thanks and Regards.
5
Hi Admin!
Many thanks, appreciate the quick reply!
6
KALI RECLOCKER / Re: Linear power supply - one for Kali + RPI3 or separate?
« Last post by sparkyadmin on June 01, 2017, 10:23:13 PM »
Hi,

   You need to connect only 5 VOLT to kali board it will supply power to RPI also.No need to connect power supply to RPI separately.

With Regards
Sparky Admin
7
VOLT + standalone AMP / Re: TPA 3118 gain setting
« Last post by nonnoare on June 01, 2017, 03:31:02 AM »
Well... I double checked, and I measure exactly 20 Kohm on the resistor shown on the attached picture... which I believe is R1... or am I mistaken?
Anyway, the board works correctly. Just curious


https://drive.google.com/file/d/0BwGKsgmlTMyNaGl1bXlGeGFZTTQ/view?usp=drivesdk
8
VOLT + standalone AMP / Re: TPA 3118 gain setting
« Last post by sparkyadmin on June 01, 2017, 02:10:55 AM »
Hi,

 Our board is set for 20db gain. The setting is R1 5.6K and R2 is open.

With Regards
Sparky admin
9
VOLT + standalone AMP / TPA 3118 gain setting
« Last post by nonnoare on June 01, 2017, 01:46:09 AM »
Hi there! I was trying to figure out what the used  gain settings are for the TPA3118 chip.  As per the Texas Instruments documentation,  the gain is set by the combined value of two resistors.  Looking at  your board,  it seems like there is only one 20 Kohm resistor (measured with a tester),  the other connection is left open.  This seems like the 20dB configuration,  but in that case the only resistor installed should be 5.6 Kohm. The 20 Kohm value,  in the T.I. datasheet,  is used in conjunction with a 100 Kohm resistor for the 26dB configuration.
Should I assume that the Volt board is set to an "unconventional"  20dB gain?
Thank you very much.
10
KALI RECLOCKER / Linear power supply - one for Kali + RPI3 or separate?
« Last post by electro_static on May 31, 2017, 05:49:37 AM »
Hi,
Iím starting up with Kali and a Rasp PI 3 (new to both of these).
Kali will - hopefully - feed I2S to an external DAC so I only have the RPI3 and the Kali to power.
As a first step, I try to understand the power supply needs for a linear PS setup.
 
I can see that  itís 5V / 3A what I try to grasp is if I need to have one PS for the Kali and one for the RPI3 or just one to power the two.
Will one 5V / 3A PS drive both the Kali and the RPI3?
Do you have any experience if a separate PS brings any improvement?
If it does, would that be two linear PSs or can I get away with a standard switching PS for the RPI3 and a proper linear one for the Kali?
 
Many thanks in advance for any hints on this!
Pages: [1] 2 3 ... 10