![]() If you run into stability issues with the reduced voltage, it's potentially more an issue with the undervolting of the SDRAM than the CPU since I'm keeping RAM at stock 500MHz (so maybe try over_voltage_sdram=-2 if you run into unexplained crashes/hangs).Īs with the Pi 3 B, the graphics parameters have remained unchanged with a low 400MHz core speed and 300MHz GPU and low gpu_mem=16 as per default there's little demand for speed or memory even with the Jivelite user interface installed. The CPU will automatically reduce the speed to 600MHz anyway when load is low. Since the Pi 3 B+ ARM CPU can run up to 1400MHz, I'm underclocking it with a maximum speed of 1GHz but keeping the SDRAM speed at 500MHz, we have a nice 2:1 ratio (Low Power DDR2 RAM has a 2X bandwidth). The undervolt -3 value represents a -0.075V lower for CPU and SDRAM (1.2V nominal for CPU and RAM) isn't extreme and works for me without worries of hangs or crashes with high workloads - the machine has been running 24/7 for 4+ weeks. ![]() Since I don't intend to connect peripherals with higher power needs off the Pi, keeping it lower at the 600mA level (same as the original Pi 3 B) is fine for me. ![]() The B+ motherboard has the ability to supply more current to USB devices - great for external hard drives and perhaps SSDs. # Force max current to USB 0=OFF (600mA) 1=ON (1.2A)Īs usual, use your favourite text editor (I like Notepad++) to change the clock speed section of the config.txt file in the root directory of your piCorePlayer SD card with the above settings: Well, here's what I'm using these days with the B+: Remember back in early 2017, I suggested we could easily underclock and undervolt the Raspberry Pi 3 with the Convoluted Rationalizations And Audiophile Perceptions (CRAAP) ™ settings. So, like before, I've been playing with the parameters to find a setting that works for my needs which includes the ability to use SoX for extreme quality oversampling (which we will be discussing below). While many Pi users probably want to try overclocking to increase speed when using it as a general purpose computer, a fixed-purpose audio streamer connected over the ethernet to my server doesn't need much processing power and I like keeping things running cool with minimum stress on the power supply. Remember that I like efficiency and value. I've been asked about this in the last couple months. Some little tweaks, things to get it working well, and fooling around with a piCorePlayer/SoX filter you can try for yourself without unnecessary hype nor expense. Today, let's hit a few topics related to the Pi 3 B+ setup above. As discussed before and in the picture shown above, these days, I have the inexpensive JustBoom Digi HAT (~US$40) board attached out the back for simple S/PDIF connectivity as well as USB when I need. Okay, let's have some fun with the Raspberry Pi 3 B+ motherboard, piCorePlayer, and my little "Touch" device I recently updated. ![]()
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