Recent content by HAL

Have the RPi4 connected to the TRRS cable to RCA cables and with the Dayton Audio UMM-6 mic have a it running with REW Beta 24 and Buster OS. Have test signals generating from the on board DAC and will be using it shortly for some measurements. Nice and portable system to use. Probably will...

For the RPi4 version I am just using the built in DAC's with the USB mic. I already have a CLIO Pocket for the other measurements, but larger than the RPi4 setup. If I did not, then would use the dspMusik 2x8. It would be the largest of the 3 setups to use, so for something small, the RPi4 is...

There is no way to do an impedance measurement without an ADC, so SPL is the measurements to make.

My other option is to use the Danville Signal Processing dspMusik 2x8 digital crossover running at 24bit/192KHz for the ADC and DAC's. I have the ADC and DAC's programmed to allow measurements via the USB bus. Works well with both the RPi3 and RPi4 running Buster.

I am using the Dayton Audio UMM-6 mic and internal sound card to start. Got the correct TRRS to RCA cable to use with the RPi4.

Yes, the command: sudo apt-get install openjdk-8-jre worked correctly and REW beta15 installed and is running on Buster.

Hello, I just received the latest Raspberry Pi 4 B+ with 2GB of memory. It needs Raspbian Buster to run, so installed that today on a fresh SDXC card and everything is running. Buster OS now comes with JAVA 11 installed with the OS image. I tried the install of REW beta15, but came back...

tesseract, Thanks for stopping by the Danville Signal Processing room to give a listen to Hollis Audio Labs The Monoliths speakers and the write-up. Glad you enjoyed them.

Oracle reopened the Java Sound bug report with the updated info. Waiting on response.

I tried the Java 8u162 latest non-beta version and still the same problem. Did a bug report for Java on Linux ARM32 processors with Oracle and they said they do not support the RPi's. Said it was a USB driver problem. I reported back that the same DAC using VLC as a file player will work...

Have the Linux version of REW Beta 8 installed on the RPi3 with Java 8u152. The 96KHz sample rate driver works well with the DAC, but the 192KHz get what sounds like buffer swapping so glitches and odd noises. Sounds similar to your PC problem with Java driver. There is a newer Java 8u172...

You need to install the latest Raspbian OS, update to latest Java 8u152 and REW 5.18 in that order. You just use the shell system to do a lot of Linux commands that are available via searches as I did.

Thanks for the update. Looking forward to trying it out.

Hello John, Is there any expected time for the next beta release to try the 24bit/192KHz version for RPi3? Just did the Java update to 8u152 on my RPi3 to test with. A lot faster than the default 8u65 installed with the OS. Best regards, Rich Hollis

Would like to give it a try with a Beta version with the 24bit/192KHz JAVA version for Linux. Was stable with ASIO driver on the PC side. As long as both the ADC and DAC are running at 24/192KHz the measurement with a log sweep and deconvolution should be stable. I have to get a bigger DC...