8/19/2023 0 Comments Plexamp on raspberry pi![]() Headless for VNC Setting up VNC on the Pi Enabling VNC server on the Pi. Also in the boot partition, create a file named wpa_nf and throw the following into it (with your own Wi-Fi name and password):Ĭtrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev.In the boot partition of the SD card create an empty file just called ssh.Make sure you've already imaged your SD card.Headless for SSH Short video on how easy it is. Headless for just SSH ( skippable with v1.7 of the Raspberry Pi Imager).On the software side, given my use cases above what do you guys recommend, volumio, Ropiee, something else?ħ.After writing this post, version 1.7 of the Raspberry Pi Imager released allowing you to set the headless SSH as part of the SD card imaging - essentially skipping the "Headless for SSH" step below! ![]() I understand that the Digione signature needs 2 PSUs, does that mean that 1 Shanti can power it or do I need to purchase 2 battery packs? Bit confused about the power situation.Ħ. Will I be able to stream bandcamp/youtube/jriver flacs from my Macbookpro to these streamers? I haven't really heard anyone talk about using these services with these streamers.ĥ. ![]() What's the best way to connect the Digione Signature to the Hugo2 for the best sound quality?Ĥ. What's the best way to connect the PIE2AES to Hugo2 for maximum sound quality?ģ. I don't mind paying a bit more, is there a DAC-less streamer that is clearly better than both PIE2AES and Digione signature that I should look at for use with Hugo2?Ģ. Maybe somebody here can answer my questions, very hard to find answers:ġ. Host do not decide when to send a next frame, just a device, it is a difference.Īs some devices are not able to work in this mode, while there are reporting that they could, usually there a setting in the app to deactivate this mode. The end point is programmed to send requests for the next frame when a receiver is ready for it. It is called the asynchronous mode with an explicit device end point. As Rpi users speculate about improvements in SQ when adjusting CPU frequency to the multiplies of the audio 44.1/48kHz, I suspect that before Rpi4 came out, it worked in this mode.Ī second mode is much simpler and easier to implement on the host, it require not so much resources and a transmission do not break so frequent. When there is a problem with synchronisation, we can hear short occasional prr.prr. It is a synchronised mode with a master clock on the receiver, so it should be no jitter added, but in practice a host may have problems with synchronising frames, reacting to the system requests in time. In this scenario USB host receives a feedback from a sink (USB terminology for a down stream device) and a speculative correction is taken based on this feedback. One with a frame clock created at the host. However there are two USB isochronous asynchronous modes for audio tranfers in addition to the older: synchronous (completely outdayed) and an adaptive mode (that brought first time satisfactory results). Sorry guys.Ĭlick to expand.I spoke the same all the time. Lack of such option is an indication that Rpi is unable to work in the event driven mode and I know it would be wasting my time to try Rpi. Such option is mandatory as some older USB receivers cannot handle event mode, only a push mode (I described how it works in the previous paragraph). With a proper USB driver design there should be an option in software to switch to the event driven mode, similar to the applications for PC and MAC OS. Secondly and the most important is a point I made before. It means that bit-clock cannot be used for the clock synchronisation, only a frame clock which is evaluated in a software. Number of samples inside the frame is adjusted a bit to achieve the average sample rate close to the standard audio sample rate frequency. I think there is confusion between bit-clock stability inside the frame and the time that marks the beginning of new frame. Even with a single device USB driver waits for a proper time to send a next frame to the isochronous sink and precision of this moment is related to the delays in the interrupt driven routine that calculate this event in a software. Now Rpi4 comes out which fixes some limitations and all efforts are still at adjusting system clock frequency to the transfer rate.įirst things which shows immediately failure of this approach is that system clock is not directly linked to the USB frame rate as USB is a shared bus with multiple devices on the bus. How long is Rpi on the market? How many models were introduced? And they didn't figure out that USB performance is a key feature. Click to expand.I don't think it is worth an effort.
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