MPD can use the famous soxr library for resampling. Soxr is very flexible with the configuration of the resampler. Only MPD only provide the default recipes with the quality setting. You can find a lot on internet about the usage of soxr or sox (the commandline version of soxr) , including a kind of measurements. …
More MPD soxr selective resample modes
Earlier I wrote about moOde with MPD Selective Resample about sox and resample. With selective resample takes in account if source sample rate is multiple of 44.1kHz or 48kHz. With selective resample the target sample rate is a integer multiply of source sample rate. Sox with integer ratio only cost 50% of the CPU resource. …
moOde with MPD Selective Resample
Music Player Daemon is a daemon used in a lot of (Raspberry Pi) audio distributions. Including the one that I use; moOde Audio Player. MPD supports a bunch of plugins, including SoxR for high quality resampling. Which can be used for both up and down sampling. The most common used audio sample rates are based …
Hifiberry Digi+ Pro with Allo Isolator
For quite some time I’m using the Allo Isolator for galvanic isolation between the Pi and the HifiBerry. Everything was upsampled to 192kHz and works great. No more cracks, deep dark sound. Only when starting playing with different sample rates (44.1kHz based) MPD hangs. Before using the isolator it did work. If seems that something …
moOde MPD Tweaks GUI
The moOde Audio Player MPD configuration only support a very small subset of the available MPD options. The one that are supported comes with a very nice user interface. Only sometimes I just want to try unsupported or even new MPD options. Just editing the mpd.conf isn’t an option, because Moode will overwrite the configuration …
DDDAC 1794 Build
This article is about building my own version of the DDDAC 1794 NOS DIY dac. Designed by Doede Douma. The NOS stands for Non Over Sampling DAC, without any filtering. More info: There is a massive thread diyaudio about the DDDAC 1794; nos-192-24-dac-pcm1794-waveio-usb-input. It can be a little overwhelming; it contains today almost 8000 messages. …
AMIGA Keyboard tester
During the a repair of an Amiga 2000 keyboard I didn’t found it very handy to use my Amiga as tester for a defect keyboard: During testing, to prevent damage with unplug or plugin of the keyboard, it requires power down of the Amiga.Which takes a lot of time and proceedings (the boot, shutdown etc) …
mBlock Arduino Multi Function Shield
My kids like easy coding with Scratch or mBlock. I found a nice Arduino shield for them to play with, only it could only be programmed with the Arduino IDE. Luckily mBlock provided a way to extent the mBlock environment. The Arduino Multi Function Shield is a low cost shield provided by several suppliers.It contains …
AMIGA 2000 Cherry keyboard restoration
Some time ago I was offered a defective Amiga keyboard. It was Amiga 2000 Cherry Keyboard, one of the more rare Amiga 2000 keyboards. The previous owner informed me that the keyboard was not working at all. This keyboard has several unique distinctive features: Red Amiga keys (notice different location of those keys; there is …
Raspberry Soft Power Off
There is risk to corrupt the SD card of Raspberry Pi when it isn’t proper shutdown and I do power down my audio equipment when not in use. The Soft Power Off module, based on a ATtiny85, provides a solution for it. There are some power down solutions for the Pi available, but none was …