Most Synths have some form of an arpeggiator. But to have one in a standalone device has its advantages - no more digging through menus, adapting to that "special" style of arpeggiator on every single synth, and no more need for a computer.

This little thingy is easy to build, the instructions are mostly clear and easy to follow and it is fun to use.

Thank you for the excellent midi to relay, shipping fast, low cost and efficient :-)
my Mesa Boogie Quad Preamp is now MIDI.......great
mathieu analogique

I have now owned the "Midihub 6 way midi thru and metronome module" for just over a year. This is a great little unit. I was like many looking for a MIDI Thru unit and came across this product on You tube and though I would investigate. Price competitive and the thing looks so cute and different. Having built my set up to run without being connected to the computer I could see the advantages of the Midi beat clock. Being able to set the tempo, start and stop of all my synths, sequencers and drum machines and not daisy chaining all my devices, with the push of a button and with out a computer and DAW, happy days. Having several configurations/ options it has got me through a few problems in various set-ups. Well I came to the site not knowing I needed the "midihub 6-way MIDI Thru and Metronome Module" and now it's a permanent device in my set up, whether I'm using the computer or not.

Straightforward build, great fun to use.

Docs were excellent, only (very) minor criticism is that they say the build guide etc is on Github, but it isn't -- Github has a _link_ to the docs site. Sure, clicking through isn't any effort, but if the github account disappeared for whatever reason, I wouldn't be able to find the docs (they also aren't easily findable via google).

Some standard add-ons (as separate products) might be a good addition also, like a standard case, or a larger strum board. I would guess most people would plump for a standard case (myself included), for example, rather than building their own.

This splitter is very usefull and I think it is the only modèle available with such number of outputs.
I use it to control korg volcas series ( keys, beats, etc...) And other synths.

It is well built And seems to last long.
Design is very cool by the way :)

Also the fact that it can receive any power from 9 to 12v, in any polarity is real plus !

Shipping was good, delay as expected. The maker was kind to reply my email, no bad surprises. (Ship to France)

I recommend !

Built this in a couple of hours - build instructions are excellent. the Arpie worked perfectly except for the external clock which although the clock led pulsed happily and F8 midi clock messages were being received the arpie would not recognize it and was silent when trying to use it.
I finally found that in order to get this to work the Arpie needs a midi Start (FA) message or a continue(FB) message then it works a treat.
(A midi stop (FC) also stops it)

You know, one never really thinks the need a MIDI hub... well it is not your first thought anyway. Now that I have this hub, I can safely say how cool it is and a wonderful utility. Love it!

This is my first soldering project. After a couple hiccups and some helpful advice from Jason, this thing is fully integrated into my live rig. I am using to to control a Moog Minitaur and a Roland JP-08 interfaced by a MOTU MIDI Timepiece AV and clocked via a Korg EMX. I did find that the random mode (the mode I most often use) wasn't quite random enough. It would repeat the same random sequence over and over again. However due to the open-source nature of the kit, a couple lines in the code fixed that right up, and now it's fully random. Great piece of equipment!

This is easy to build and amazing fun to play with. Get one now. NOW! My neighbours are under the impression I'm now amazing at keyboards and yours can too. Now.

I purchased this product to reroute signals in my guitar processing rack. Using a Gordius Little Giant foot controller, I can change the state of any/all relays with a single footswitch press. This product is by far the most cost effective means of accomplishing the required task.

I encountered my only difficulty when trying to use the Little Giant to program the relay configuration in programming mode. The documentation presents the midi data for configuration in hex. After some experimentation, monitoring the output of the java app in Midiox, I was able to determine that the configuration data consists of simple control change commands that many midi controllers can send.

I assembled the following chart, and present it here in case it can be of help to others such as myself.

Set relay to respond on a specific MIDI channel
CC# Value Comments
99 0 to 7 Selects which port (relay) to configure. Value ranges from 0 (port a) to 7 (port h).
98 1 Value of 1 selects the channel number parameter as the one to be configured.
06 0 Value will always be zero when configuring the channel number parameter.
38 0 to 15 Sets the relay to channel (value + 1). Value ranges from 0 (ch 1) to 15 (ch 16).

Set relay to respond to a specific note number
CC# Value Comments
99 0 to 7 Selects which port (relay) to configure. Value ranges from 0 (port a) to 7 (port h).
98 2 Value of 2 selects the note number parameter as the one to be configured.
06 0 Value will always be zero when configuring the note number parameter.
38 0 to 127 Sets the note number to which the relay will respond. Refer to a midi note chart.

Set relay duration for note on/off configuration
CC# Value Comments
99 0 to 7 Selects which port (relay) to configure. Value ranges from 0 (port a) to 7 (port h).
98 3 Value of 3 selects the duration parameter as the one to be configured.
06 0 to 127 See below.
38 0 to 127 See below.
Both values will be zero to retain relay state until note off (or on) message is received. Non-zero values must be calculated. Perhaps someone can figure out and post a formula. I always use zero values in my application.

Set relay duty cycle
CC# Value Comments
99 0 to 7 Selects which port (relay) to configure. Value ranges from 0 (port a) to 7 (port h).
98 5 Value of 5 selects the duty cycle parameter as the one to be configured.
06 0 Value will always be zero when configuring the duty cycle parameter.
38 64 Value ranges from 0 (relay disabled) to 64 (100%) duty cycle.

Set relay to be non-inverted or inverted
CC# Value Comments
99 0 to 7 Selects which port (relay) to configure. Value ranges from 0 (port a) to 7 (port h).
98 7 Value of 7 selects the invert parameter as the one to be configured.
06 0 Value will always be zero when configuring the invert parameter.
38 0 or 1 Value can be 0 (non-inverted) or 1 (inverted).

Store configuration to EEPROM
CC# Value Comments
99 100 Value will always be 100.
98 1 Value will always be 1.
06 0 Value will always be 0.
38 1 Value will always be 1.


PS. The formatting was destroyed upon upload to this review board. The CC#, Value, and Comments columns were squashed together into one unreadable mass. Knowing these are three separate columns might make it easier to decipher the information in each section.

I only originally bought this to let me chain midi stuff but I've found the midi clock function really useful and now use it to sync Ableton with various Volcas and hardware sequencers. Need a midi merge next (or switch box) so I can add the Arpie and Le Strum :-)

Great DIY for beginners - I guess. It took me like 2 hours or so to finish everything and it worked at first shot! Very good and detailed walkthrough for the soldering process, as well as for debugging issues.
I can suggest this kit for soldering starters... ;-)
Flavio.

I assembled the kit today and all eight channels are working perfectly. I couldn't be more pleased with my purchase. Seller was easy to get ahold of and was happy to answer my questions.

The kit arrived in great condition, all parts were safely wrapped. Documentation was thorough and relatively easy to follow, even for someone with no previous experience like myself. The configuration app worked fine, but was a little tricky to figure out at first (be sure to read the instructions very carefully)

Thanks for the great product.

Was easy to assemble. Clear instructions and parts fit well. Worked first time around. Would highly recommend.

I built it in two hours, just relaxed, enjoying assembling, building the unit and placing the parts as described by the manual.
It has a very clear description of the parts, and where to put them on the boards.
No questions here.
When finished, it worked instantly and I love the the way it works.
After fiddling about with the buttons for a few minutes, you get a clear picture of it's cappabilities.
Much of the functions speak for them selfs, and if not, there's always the manual.

Missing anything?
Yes, I would like to see a bypass or THRU function, which keeps the unit in the MIDI chain and allows you to play your live played parts as well.

I ordered a ARPIE case, which came a few day's later because Jason had some trouble with his 3-D Laser cutter.
Communication was very clear and helpfull about this small issue, no problem there...
But the front panel offered not as much protection to the buttons and LED's as I expected.
There's no cut out per LED or switch, leaving these parts as unprotected as is whithout the ARPIE case....

Overall, I give a BIG BRAVO to Jason, offering this small but fine piece of MIDI gear to the world!
Keep up the good work....

Best regards,
Aad

This product really works stable and plug and play. Great purchase! A housing for the device would be great, but we can work without...

I've now bought and constructed a number of products from hotchk155. I cant fault the quality of the components, the construction of the pcbs or the documentation. I'd recommend le Strum and Arpie to anyone thats interested. Easily constructed they do just what appears in the tindie videos

My novice son put together the kit and it worked first time out of the gate. A quality, high value product.

Does exactly what you need it to. Highly recommended.

Solidly built, compact, easy to use. What more could you want? Buy one now!!!

I am not the most skilled person on tindle, and so even though the instructions were clear enough, I did take me some time and a little bit of help to get this working, but when it did... wow! You have saved all of my autumn evenings. This is just amazing!
Such a great concept!

/ KJ

Purchased my unit some time ago and just updated the software to version 4 today. Just incredible! Documentation has improved vastly. The power and functionality of this little device easily holds its own against much higher priced units. The inventor has always been available to answer any questions I had. He is clearly dedicated and works on improvements as feedback and his own ideas dictate. I highly recommend this to any musician wanting to experiment with an arpeggiator.

I got this a few weeks ago and have been using it constantly since. I also have a Kenton midi thru 5 so it's easy to compare. I like the fact this thing runs off 5v USB power, making it ultra portable with my Korg volcas and Electribe which all run on batteries. These together with a pocket 8000 mah battery = ultra portable midi music. The metranome is another cool feature again for things like the Korg volcas. It also has SIX midi outs... Surly enough for anyone on the go.

Really happy with this and I have already recommended this item on several synth forums.

Really enjoyed putting this together, and the results are great. Stick it into a non-arp synth and breathe new life into it! The DX7 sounds amazing with this box, which has so many great features.

I like the 6-way MIDI Thru and Metronome Module very much. Beside the fact it´s very well build and quite simple to use and understand you get a lot of features for a very reasonable price. I don´t think there is something comparative on the market at the moment.

This well-built (and beautiful!) little thingy has made synchronizing synthesizer jam sessions a breeze. Highly recommended!

Great communication from the seller. Simple clear instructions included. Should go together very easily even with basic soldering skills. Had it up and running in about an hour.

Works a treat. Can connect all my older gear without worrying about the lack of midi-thru ports. Flashing leds always a bonus!

Highly recommended.

It worked the first time, and was simple to put together. I would definitely buy it again. It's such a bargain. If you've ever soldered a board, it is easy as pie. Go for it!