A lot of users, including myself, struggle to get measurements over AirPlay to work with Volumio. I believe this has something to do with Shairport not liking short segments of audio. The workaround is to transfer the sweep file to the audio system as documented in the app note. If anyone knows more about this, I’d love to hear from you
The next most common question is about transferring files from iOS devices to a Samba share. There is an issue where files look like they have transferred, but have a size of zero bytes. This might be an RPi issue only. The fix is to install the Fruit Samba VFS module on your system. Instructions are here.
You can add your files in the shared folder /data/INTERNAL/FusionDsp/Tools to be able play them directly.
I also propose you to include your sweeps in Tools in order to make it easier.
Contact me if you are interested
Thanks, that’s an interesting idea. Let me mull that for a bit. The sweeps are actually generated on the device as it was easier (for me) to support different combinations of channels (and perhaps lengths in the future).
I released an update to HouseCurve over the weekend. It contains some features that Volumio users have asked me about in the past:
Saved measurements can be exported as impulse responses. Go to Plot Setup → Saved Measurements and press Select. Choose the measurements you want and press export. You can then load the impulse into tools like REW, etc.
Filter impulse responses are now 500 ms long, with the number of samples depending on rate. This should significantly reduce processor usage, especially on a Raspberry Pi, etc.
Please reach out if you have any questions, and don’t be shy about posting in this topic. Enjoy
What a difference!
measured from 4 different positions in my room and let HouseCurve do the math, uploaded the text file in Fusion DSP, made some minor changes to map my listening position and voila! Turning the new setting on and off from the playback interface > you have to create a new preset and give that one a new name.
Congrats and thanks to the developers, it is worth every penny!
Used HouseCurve on my iPhone
And have a 2.1 setup with a tube amplifier, Wharfedale Denton’s 85th and a SVS SB1000 Pro
If you’re playing music via Bluetooth, then I think it would be fine. If you intend to use other sources, I might not rely on it for measurements… bluetooth sq is iffy. I’m surprised pink noise works but the sweep doesn’t. Your system might still be clipping, pink noise could be hiding it.
The FusionDSP plugin has a toolkit that includes the HouseCurve sweep file (scroll to the bottom of the FusionDSP settings, add toolkit, select sweep to play). You could try that for measurements (put HouseCurve in external sweep mode).
Hi Greg, I have a Hegel Amp which never clips using Airplay. I remember reading somewhere that Hegel applies a workaround to control volume internally, whereas Airplay protocol apparently dictates volume to be applied at the sending device. Could this be a hint for you?
For ios I can recommend Owlfiles. It integrates well with ios Files. I had no issues with file transfers to Volumio. Hope it helps