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Messages - sam

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Questions / Re: Extending biofeedback electrodes?
« on: March 26, 2018, 01:55:14 PM »
Yes, dry soil doesn't conduct electricity very well (unless wet). 

The biodata sensor uses two electrodes which measure electrical conductivity between the trodes.

Essentially, your experiment shouldn't work if the user is holding a glass jar, that glass will insulate and prevent the user from being measured.   

Now ... there are many situations where strange electrode configurations will produce 'output' (like put one trode on one person, the other trode on another person, and then move really close together without touching).

Sometimes moisture/humidity in the air is enough to allow a small flow of current... but the best way to use the tool is to have a good solid connection with the organic system which is being studied.

Questions / Re: Running multiple electrodes into MidiSprout?
« on: March 26, 2018, 01:45:28 PM »
Electrodes are just wires with sticky pads at the end (the sticky happens to be electrically conductive).  You can use any type of conductive material as the electrodes, and you can join together wires to connect multiple pads/trodes.  My first electrodes were just pieces of silver jewelry wire which i taped to the leaves of a plant ;)

Questions / Re: Running multiple electrodes into MidiSprout?
« on: March 25, 2018, 11:07:09 AM »
You certainly can split and splice electrode cables together.  Standard 3.5mm audio adaptor/splitters wont really work since the electrodes are setup as mono tip/sleeve on the connector.  There are 'tens' electrode leads which branch into many connectors, or you could use wire cutters and splice multiple snap leads together yourself.

But you will need to experiment to see what results you get, I have seen 'multiple plant' split setups where there was very little or no 'activity' read by the Sprout - described by one user "as if the plants were canceling each other out". 

If you are able get activity readings from both plants at the same time, it will likely be a bit noisy ;)   Already the sprout is like a toddler mashing on a keyboard, think two toddlers mashing at the same time! 


Questions / Re: MIDI Sprout purchase
« on: March 22, 2018, 05:56:31 PM »
Okay, I hope/suppose they have some sort of support email with your order. If you can't find any other contact method let me know.

I'm not a part of Data Garden, they produce and sell my open source designs. I try to support all users of the technology here in this forum community, along with some really great users who provide advice and share musical experiences.


Questions / Re: Setup and Usage of MIDI Sprout
« on: March 20, 2018, 05:00:28 PM »
The LEDs on the sprout correspond to the musical notes which are being played.  The Sprout is limited to 5 note polyphony, only 5 notes can play at any one time.  The presence and duration of those notes are shown by the fade/flash of each of the 5 LEDs.

I am glad that you were able to get your MIDI flowing.  The Sprout is a MIDI 'Output' device, similar to a piano keyboard which plays notes and sends MIDI to a synth or computer.  You want to run the Sprout Output to the MIDI Input on your interface.  The other connector is the MIDI 'output' from the computer, which you could connect to another synthesizer or computer.


Questions / Re: MIDI Sprout purchase
« on: March 20, 2018, 04:55:40 PM »
Hello Carletta, no I didn't get an order or any emails.  Did you buy it through my electricity for progress store or did you submit an order to the datagarden dudes?


Excellent setup tutorial Nicola! Thanks for helping Reason users get rocking!


Development / Re: Help programming 328-PU series
« on: February 28, 2018, 11:30:23 AM »
The Sprout does not have the bootloader pre-installed, you can program the chip on the Sprout using an ICSP programmer (or an arduino-as-isp).

Some of the Sprout kits have an arduino bootloader, but that's cause i manually flashed them.


Questions / Re: Setup and Usage of MIDI Sprout
« on: February 25, 2018, 04:28:24 PM »
Hi Carol.  Sounds like the USB MIDI cable isn't setup correctly What type of USB MIDI cable are you using?  In MIDI Monitor any USB midi device should show up in the Sources --> MIDI Sources listing.  The Sprout has a MIDI Out which should connect to your computer MIDI In port. 

Questions / Re: 555
« on: February 16, 2018, 01:30:20 PM »
In order to accomplish your goal, i believe you will need to edit the code and identify the specific conductivity and change states which you consider to be a 'yes' or 'no'.  The 555 timer itself will not give you the simple yes/no data you are looking for.   I don't believe that you will be able to 'hear' the plant changes just from the output of the 555, perhaps you could change the 100k resistor to a potentiometer, that will give a different sensitivity level. 


Questions / Re: Anyone willing to share MIDI files?
« on: February 12, 2018, 08:18:49 PM »
Hello iamian, sure i'd be happy to share some raw data.  Please find linked here some MIDI from a session on the sckuylkill river banks here in Philadelphia.

Questions / Re: MidiSprout with Mininova Midi issue?
« on: February 12, 2018, 08:11:34 PM »
Hey Adrian!  The MIDI Sprout sends MIDI note data on Channel 1 and MIDI CC 80 , you might be getting the error due to the MIDI CC hitting the novation. 

I can admit that i've sent more than one bad byte over MIDI during the arch of this project, and it aint' hard to mess up a low voltage 33,250 baud signal... but I doubt your sprout is sending bad data.  Most likely it is sending 'too much' data, the sprout is 5 note polyphonic and has the wiggly CV so that is probably pissing off the mono novation.

Questions / Re: Old Synthe ?
« on: February 12, 2018, 08:07:48 PM »
The Sprout should work with ANY general MIDI compatible device.  Your Clavinova or Plaggero should both work just fine.  After looking at the instructions for both digital pianos, it is actually a big pain in the ass to get the MIDI input to respond to the correct channels (its all setup for drum machine input on the Clav and takes many keystrokes to change). 

Please make sure the MIDI cable is going into your Keyboard MIDI INPUT port, if there is a lightshow on the MIDI Sprout then you should have MIDI data pouring out to your keyboard.

No they are not too old, but it looks like they are hard to configure for MIDI input.

Questions / Re: 555
« on: February 12, 2018, 08:03:54 PM »
If you want to use the raw data from the 555 timer (set as astable multivibrator) you will want to put a small inline current protection resistor (<1k) from pin 3 output and then drive either an opamp or a transistor amplifier in order to drive a speaker.  I have used this method and the result with plants is a buzzing sound.  This method works great with humans squeezing apples, as variations in skin pressure make audio tones!  The plant data might not be knowable/understandable directly through the speaker for a human listener, although there will be a distinct tone with some warbles.  It is a great experiment, and I very much hope you try out the circuit with a 'raw' output!

I use high speed pulse width measurements (using an AVR microcontroller) and detect changes in the length of those pulses. That way I am able to extract data from a stream of high frequency pulse data and produce MIDI notes based on width fluctuations, and those notes are humanly recognizable.

There is a large misconception with how this device measures 'frequency' and 'vibration' and 'plant music'.  The frequency is represented by the sample rate (how often the computer checks the pulse), the frequency used to measure changes is in the 1kHz - 100kHz range.  The notes are triggered when there are multiple changes, those changes happen at the microsecond level and occur in bursts hundreds of times per second, they are not perceivable to human senses.

Please, build the circuit.  Attach it to plants.  Let me know how it goes!


Questions / Re: USB midi not responding
« on: February 12, 2018, 07:51:26 PM »
I use the EMU 1x1 USB MIDI device, which has been rock solid for me (perhaps with a usb extension cable for strain relief)

Unless you mean actually going to Best Buy, who offers the UM1 MIDI interface, i don't have it but i'm sure it works.

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