Hi everyone.
I started to make my dream project and I decided to do that with Arylic products.
My project is to build a unique stereo monitor pair with two separate identical cabinets.
Each cabinet consists:
6.5 inch dual concentric speaker driver “JBL”
passive speaker crossover,
Up2Stream Amp Mono V4 Board,
Up2Stream Button Board,
Up2Stream S/PDIF (one speaker with “In Board” other with “Out Board”)
Up2Stream Volume Knob Board
3ch Digital Logic Level Conversion Module PNP/NPN to NPN (in:3v3 out:24v) - for the led indicators,
Power supply Mean Well RS-150-24 - 24VDC Single Output at 6.5A,
Front panel of each speaker cabinet will have:
1 x Volume knob,
4 x Push Button Momentary Switch - for first four preset,
4 x Push Button Momentary Switch - for previous, next, play/pause,stand by,
1 x Toggle switch On/Off Latching RGB Triple LED 24v - for power on/off and led indicators for: wifi, bluetooth, aux, usb,
Rear panel of each speaker cabinet will have:
1 x NAC3MPXXA - NEUTRIK powerCON D-type chassis connector - for 220v power in,
1 x RJ45 CAT 6 D-type chassis connector - for network connection,
1 x USB3.0-TYPE C D-type chassis connector - for DAC and ACP Workbench,
1 x USB2.0-TYPE A D-type chassis connector - for USB Stick,
2 x RCA D-type chassis connector - for analog audio stereo input (AUX 1)
1 x 3.5mm TRS Jack D-type chassis connector - for analog audio stereo input (AUX 2),
1 x 3.5mm TRS Jack D-type chassis connector - for analog audio stereo output,
1 x 3.5mm TS Jack D-type chassis connector - for analog audio SUB output,
1 x Toslink fiber female D-type chassis connector - for S/PDIF in/out,
Problems what I currently have:
When you are using only one Up2Stream Amp Mono V4 Board everything works better than perfect, but when you want to set up a pair of them to work together then your problems begin.
1 - PROBLEM “SYNCED VOLUME CONTROL”
Both boards are set in mono mode for more output power.
In 4STREAM APP dedicated LEFT channel to one and RIGHT channel to other board and also paired in group to play synchronised.
In this situation we have GROUP VOLUME for both boards and it works well when you control the volume from the 4STREAM app or spotify with your mobile phone.
- Problem is that if you are using a volume knob (encoder) from one speaker you are regulating volume only for that speaker.
** My suggestion would be that when two or more boards are set in one group then every volume knob (encoder) from every board should regulate GROUP VOLUME.
2 - PROBLEM “SYNCED IR REMOTE”
In the same setup like previous.
- Problem that you can’t use the IR REMOTE at all if you have two boards in one room.
** My suggestion would be that when two or more boards are set in one group then IR RECEIVER should be active only on the master board and others disabled automatically when the group is created. Or all IR RECEIVERS should be active and retransfer the control information only to control the MASTER BOARD. In either case with IR REMOTE you should control only the MASTER BOARD when there is a group present.
// Because in grouping boards together there is sound latency from synchronization around 1000ms and that is an impossible solution if you want to watch a movie or video, you can pair these two boards in another way but you have other new problems.
3 - PROBLEM “ANALOG / S/PDIF AUDIO OUT ONLY ONE CHANNEL NOT STEREO”
Both boards are set in mono mode for more output power.
In 4STREAM APP dedicated LEFT channel to one and RIGHT channel to other board and they are separate, not joinet into a group.
- Board with a dedicated RIGHT channel is playing music even from a streaming service, DAC or line in, the output from that board is only the RIGHT channel no matter if you are using S/PDIF or analog audio out (there is no way to get the LEFT channel on the LEFT BOARD if on the RIGHT BOARD is dedicated RIGHT channel).
** My suggestion would be that output connectors should be in stereo no matter the choice of the board (LEFT, RIGHT, MONO, STEREO) if that is possible with this hardware.
4 - PROBLEM " LINE IN/OUT AND S/PDIF AUDIO LATENCY"
In the same setup like previous.
- There is audio latency on the outputs or input of the board and that is approximately LINE IN - 12ms and S/PDIF - 38ms.
** My suggestion would be that you can calibrate that difference with MonoChannel Delay ( 0x8a ) with APCWorgbench, but the problem still remains if you use the stereo mode of the amp board (there is no delay option for the stereo).
5 - PROBLEM “SLEEP AND WAKEUP”
- I didn’t find how to set up sleep mode when the input signal is not detected and wake up when the signal is present. If there is a way to set this please let me know, otherwise you should consider adding this option in future.
I’m hoping that it is possible to find solutions and resolve most of these problems with firmware updates or if that’s not possible than with some new generation of DIY boards.
Waiting for discussions and possible solutions.
Merry Christmass.
