Ploytec usb driver key12/31/2022 = Results Per Byte =ĭescription: Steinberg Midex 8 USB Midi Driver Message latency: 0.39 ms Total time: 64.520 sec Message AverageTime: 0.06 ms 0.33 ms 0.39 ms Message MinimumTime: 0.03 ms 0.00 ms 0.04 ms Message MaximumTime: 0.18 ms 1.67 ms 1.73 ms System exclusive mixed with realtime messages: no Processor(s): Intel(R) Core(TM)2 Quad CPU Q6600 2.40GHz OS: Professional, Service Pack 1 (Build 6001) For less than $25, I really dont think it gets any better than this. The max deviation is also very impressive with max of 1.67 (!) ms making this the tightest timed midi interface I have used to date. To summarize that rather long list, the GM5 bests the Midex 8 by about a factor of 2 pretty much down the board and by about a factor of 3 for the midisport. For those who don't know how to interpret these results, low numbers and tight groupings are what you want to see. I run 2 Midiex 8s and also had some other interfaces (my Novation controller and a Midisport 1x1) to test against. Test Setup: Vista32, same USB port, same midi cable with a loop back using Miditest 4.6. 5 in/out ports are available per chip and a 5x5 PCB is in the works but for my tests I am only using the 1x1 PCB which was the only thing available at that time. The chip is class compliant so it runs without and drivers under win32/win64/mac/linux but also has a dedicated driver for win32 to overcome the shortcomings of the generic windows midi driver. It is worth mentioning that this chip is a TQFP32 package which is a SMD so you will need an appropriate iron to solder this in. Parts from Mouser came to another $12.00. The price of the chip is 4.50 € and the 1x1 pcb is another 3.00 € ($ 10.50 US). The uC itself is an Atmel AVR AT90USB162 which is a very high performance 8 bit chip with 16kb of FLASH and a onboard 512b EEPROM. They also offer the PCB for this project but I opted for the Midibox ( tk_gm5_bulkorder ) version which has the correct jumper pinout for connecting to a Core module. USB Audio and more) out of Germany who produces various midi odds and ends. This chip was brought to my attention via the Midibox forums and is produced by a company called Ploytec ( Ploytec GmbH.
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