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Found 6 results

  1. I have an issue with my Allo katana stack. The microcontroller is producing a strange noise...and no sound is being produced by katana stack. Used to work fine for about 8 months. Seems to be an heating issue which affected the controller. Anyone suggestions what to do?
  2. I've had my Katana (w/Isolator) for about 9 months. Working fine until a couple weeks ago when the DAC output died. I've tried all the usual troubleshooting tactics - soft reboot, power cycling (clean side first, then dirty), swapping out the RCA cable, different amps - nothing. Everything in the UI and via SSH console appears normal, but no sound. Any ideas? The LED status indicators are all functioning normally (I think).
  3. Have Katana with 5v volts to Katana, 5v to microcontroller, 5v to RPI. J30 on katana is open, J26 1&2&3 all open. Using brown black wire to Katana taking care to note that Positive is connected to center pin and check with voltmeter on green connector polarity is correct. Worked fine last night 6-7 hours after going to three PSU from recommended setting RPI /MC two PSU method. Today had trouble with card after updating Netdata from dietpi version to newer one, wouldn't boot anymore. Edit repowered entire device several times in quick succession. So reflashed another card with Dietpi and updated to 6.21.1. I have also tried another card with ropieee updated and no difference (I selected right sound card and time zone and restarted) Noted that on Microcontroller power led was solid green and the optional or status LED is fast blinking green. So powered off device walked away for 15 minutes (takes awhile for LEDS to go out. Then powered DAC, waited 30 secs, powered micro controller waited 30 seconds for green light to stop flashing and it didn't. So powered RPI red light solid (never blinks) and console output appears on LCD, see all services load, option light still flashing... Login as root run dietpi-config ensure Katana sound card is selected, try just-boom and select ALSA and unable to configure. Like DAC isn't detected. When I shut off device there are some sounds made until power is drained. So have fluke voltmeter my LPS is 2 x 5.10v with no load, a iFi iPower 5v power RPI its 5.08v no load. Have a Allo Digione Signature in another part of house bring it to main system test all three power sources with two at a time and they run it no problem... Tried returning Jumper to J26 2&3 and powering back with RPI and MC separately option led still blinking fast green. EDIT Option light seems to slow blink 3-4 times when first powering, goes dark then settles in to fast blink. Now I have to note that the connector to DAC has a very sharp bend to wire see first jpg, the brown and black are almost pinched between connector and board above. Socket is bending forward from force. So didn't power up, I replaced four 11mm stand off's included with Katana, with four 12mm see last jpg, so a stand off that is a 1 mm longer taking some of pressure off of brown black wire and it's connector. This leaves the GPIO 1mm ajar but sounded fine last night for 6-7 hours. I might add the sound last night was 20-30% better with three power supplies and really worth the expense. EDIT In Allo Katana Acrylic Case this work around does leave the 6 adjustments for the OPAMP board near very top of holes, No issue for me unless they release a procedure for making an adjustment, trust what was done while testing was sufficient. The RPI is a 3B and last but not least I tried that stand alone and using dietpi to select HDMI audio sounds fine without Katana. Any other suggestions? Already missing the sound of Katana as I type this listening to DigiOne 😞 EDIT Last but not least I disassembled Katana and plugged green connector that leads to brown black cable took voltage reading off white end with two different power supplies. Good to within .01 of a volt input to output so doesn't seem to be problem there. Was going to post a question as to whether this sharp bend with default stand-offs was normal and if I could get a new part if not. Instead I am getting concerned a device less then a month old is defective...was hoping to spend day relaxing listening to good music instead ahhh DIY. EDIT On reassembly went back to 11mm stand off's and using paper washers this gives about .5mm more space for white power connector to brown black wire and still leaves the opamp adjustment clear inside the small small holes in case.
  4. For the best sound quality Allo recommends connecting three power supplies. 1 to microcontroller , another to the katana and one to rpi. I have the katana and an isolator 1.3, my question is; is it possible to connect three power supplies, one to microcontroller, another to the katana and one to isolator? Katana tech manual shows how to connect the katana and the isolator with 2 PSUs, but is there a way to get better sound with 3 power supplies? For the three power supplies on page 6-7 (3 power supplies)of the katana tech manual shows J30 jumper in katana open; while on page 4 when only two power supplies are provided with the isolator katana jumper J30 is closed. When connecting three power supplies with the isolator (if possible) should J30 jumper on katana be closed or open? Thanks in advance. Rajesh
  5. Hello everyone, I've just purchased then new version 1.2 of the Katana + Isolator DAC (but I haven't received anything it yet). I would like to try to solder XLR connector on it (as it's said it can be done). I tried to download every documentations I could find on Allo website : I found a lot of details on how to power each card of the "bundle" but only a few about where to "plug" XLR connectors. From what I saw : I don't have the detailled schema who explain which of each their "...soldering points ready..." are supposed to be used to (I'm speaking about how to identify the positive, negative, drain and chassis ground soldering points on the board). Thanks a lot for your help
  6. Hello, first of all, I'd like to say i'm not fluent with english so please, try be comprehensive with me ? I have 2 questions. Both of them are related to my configuration which is based on : A Raspberry PI 3 B+ (1 board) An Isolator v1.2 card (1 board) A KATANA V1.2 DAC (3 board) That makes a 5 boards stacked in the selled by Allo acrylic Case. This config is powered by 2 external power (both 5V 3A : coming from Allo's website and bought with the Katana) : 1st one directly on the Isolator card (USB-C connector) 2nd one using USB-C connector on the card on top of the set-up (SparkOS Micro Controller) There is a 8GB sd Card on which I've installed Volumio. Volumio is reading audio files from a NFS share located on a NAS. I don't have issues to read FLAC files but I can't read AAC, SACD tracks inside ISO file, DSD tracks inside ISO file, DFF files. 1- Can you explain me how can I do that please ? I also realised that when I don't play any track, it's like if there were some "wind" in the room. I mean I can hear a noise which I don't hear if I switch my amplifier on another source (like CD player, turntable or TV). 2- Do I have to check or change anything to make it work normally ? Any help will be appreciated. Thanks a lot.
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