Muse Developer Resources
<https://sites.google.com/a/interaxon.ca/muse-developer-site/>


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      Developer FAQ

Contents

 1. *1 *How do I get Muse data into my program?
    <#TOC-How-do-I-get-Muse-data-into-my-program->
 2. *2 *How do I install the dependencies for the Muse SDK?
    <#TOC-How-do-I-install-the-dependencies-for-the-Muse-SDK->
 3. *3 *What kinds of data can I get out of the Muse SDK?
    <#TOC-What-kinds-of-data-can-I-get-out-of-the-Muse-SDK->
 4. *4 *I can't seem to get Muse to pair with my computer. What should I
    do?
    <#TOC-I-can-t-seem-to-get-Muse-to-pair-with-my-computer.-What-should-I-do->
 5. *5 *After pairing my Muse in Pairing Mode should Muse continue to
    stay in Pairing Mode (all lights flashing)?
    <#TOC-After-pairing-my-Muse-in-Pairing-Mode-should-Muse-continue-to-stay-in-Pairing-Mode-all-lights-flashing->
 6. *6 *When I pair Muse with my Mac, it says "Connected" for about 10
    seconds, and then "Disconnected". What should I do?
    <#TOC-When-I-pair-Muse-with-my-Mac-it-says-Connected-for-about-10-seconds-and-then-Disconnected-.-What-should-I-do->
 7. *7 *I can pair Muse with my computer, but when I run MuseIO it
    disconnects after a few seconds. What should I do?
    <#TOC-I-can-pair-Muse-with-my-computer-but-when-I-run-MuseIO-it-disconnects-after-a-few-seconds.-What-should-I-do->
 8. *8 *How many Muse can be connected to one computer?
    <#TOC-How-many-Muse-can-be-connected-to-one-computer->
 9. *9 *A maximum of 4 is recommended per
    computer:http://support.apple.com/kb/ht3887#howmany
    <#TOC-A-maximum-of-4-is-recommended-per-computer:http:-support.apple.com-kb-ht3887-howmany>
10. *10 *My computer is asking for passcode when I attempt to pair it
    with Muse, what should I enter?
    <#TOC-My-computer-is-asking-for-passcode-when-I-attempt-to-pair-it-with-Muse-what-should-I-enter->
11. *11 *If your computer asks you for a PIN, type in "1234".
    <#TOC-If-your-computer-asks-you-for-a-PIN-type-in-1234-.>
12. *12 *I can't seem to get good signal with my Muse!
    <#TOC-I-can-t-seem-to-get-good-signal-with-my-Muse->
13. *13 *How much data is produced per minute?
    <#TOC-How-much-data-is-produced-per-minute->
14. *14 *What is the time precision accuracy of the data?
    <#TOC-What-is-the-time-precision-accuracy-of-the-data->
15. *15 *How do I synchronize to an external clock? 
    <#TOC-How-do-I-synchronize-to-an-external-clock->
16. *16 *When will the next update to the SDK be released?
    <#TOC-When-will-the-next-update-to-the-SDK-be-released->
17. *17 *I want to know more about EEG and BCI, what are some good
    learning resources?
    <#TOC-I-want-to-know-more-about-EEG-and-BCI-what-are-some-good-learning-resources->



      How do I get Muse data into my program?


At this time, LibMuse is available for iOS and Android. Desktop versions
of LibMuse are in development, slated for initial release in Q1/Q2 2015.
Currently there are two alternatives.

 1. Use MuseIO
    <https://sites.google.com/a/interaxon.ca/muse-developer-site/museio>to
    connect to Muse and stream data over OSC to another program running
    an OSC server. 
 2. Implement the Muse Communication Protocol
    <https://sites.google.com/a/interaxon.ca/muse-developer-site/muse-communication-protocol>,
    which defines how Muse packets are encoded and compressed.


      How do I install the dependencies for the Muse SDK?

You should not have to manually install any dependencies to use the SDK.
The SDK comes packaged as a standalone installer. Older versions
required the manual installation of several packages, including things
like Google Protocol Buffers. However, this is no longer necessary. We
highly recommend uninstalling old versions of the SDK and using the
latest one, as it will require much less manual configuration, and
you'll be able to get started much faster. Download the latest SDK here:
https://sites.google.com/a/interaxon...-site/download
<https://sites.google.com/a/interaxon.ca/muse-developer-site/download>


      What kinds of data can I get out of the Muse SDK?

Many kinds of data are available in the Muse SDK including raw EEG data,
raw accelerometer, raw FFT coefficients, relative and absolute band
powers for Alpha, Beta, Delta, Theta, and Gamma waves, blink and jaw
clench detection, and more. This data is currently accessible using
MuseIO, and will be included in the full native SDK which is coming soon
(January/February 2015). For more information, see the MuseIO
documentation here:https://sites.google.com/a/interaxon...paths---v3-6-0
<https://sites.google.com/a/interaxon.ca/muse-developer-site/museio/osc-paths/osc-paths---v3-6-0>


      I can't seem to get Muse to pair with my computer. What should I do?

The specifics of this are different for every platform, but in general
the first thing you should do is to start completely fresh:

 1. Factory-reset your Muse. From an off-state, hold the button down for
    at least 15 seconds until the LEDs begin to flash in an alternating
    back-and-forth pattern. Then release the button and press it again
    for about 3 seconds to turn the device off.
 2. Make sure to kill any instances of MuseIO that may be running on
    your computer. Having MuseIO running at the same time as your
    machine is attempting to pair will cause problems.
 3. Delete any previous pairings that may have been established between
    Muse and your computer.
 4. Turn Bluetooth off on your computer, wait ten seconds, and turn it
    back on.
 5. Attempt to pair.If this doesn't work, make sure your Muse has the
    latest firmware. This can be done with the Calm application.
    Assuming you can pair Muse with your mobile device, open Calm and go
    to Settings -> Check for updates -> Muse headband version. The app
    will tell you whether or not you are at the latest version.


If you are still having difficulty, you may want to try to use a USB
Bluetooth dongle. There is a list of recommended dongles that we have
tested for compatibility with Windows 7 (Bluetooth problems are
especially prevalent on Windows, as there is less predictability with
third-party hardware) on our developer site:
https://sites.google.com/a/interaxon...ware/bluetooth
<https://sites.google.com/a/interaxon.ca/muse-developer-site/muse-hardware/bluetooth>


      After pairing my Muse in Pairing Mode should Muse continue to stay
      in Pairing Mode (all lights flashing)?

Yes, pairing mode does not end because a pairing is completed. The only
exception to this rule is on iOS mobile devices, which will immediately
connect after a pairing. 



      When I pair Muse with my Mac, it says "Connected" for about 10
      seconds, and then "Disconnected". What should I do?

This is the expected behaviour when you pair Muse with your Mac. The
pairing process only establishes the pairing. Once it pairs, it
disconnects until some other program requests to connect at a later
time. So it will initially show "Connected", then after a short time
"Disconnected" in the Bluetooth device menu when pairing with Muse.

You must run MuseIO
<https://sites.google.com/a/interaxon.ca/muse-developer-site/museio> to
connect with Muse. The forthcoming LibMuse for desktop will also be able
to connect to Muse, of course.


      I can pair Muse with my computer, but when I run MuseIO it
      disconnects after a few seconds. What should I do?

Make sure your Muse has the latest firmware. This can be done with the
Calm application. Assuming you can pair Muse with your mobile device,
open Calm and go to Settings -> Check for updates -> Muse headband
version. The app will tell you whether or not you are at the latest version.

Often Bluetooth connectivity issues can be alleviated by using an
external USB Bluetooth dongle. There is a list of recommended dongles
that we have tested for compatibility with Windows 7 (Bluetooth problems
are especially prevalent on Windows, as there is less predictability
with third-party hardware) on our developer site:
https://sites.google.com/a/interaxon...ware/bluetooth
<https://sites.google.com/a/interaxon.ca/muse-developer-site/muse-hardware/bluetooth>


      How many Muse can be connected to one computer?


      A maximum of 4 is recommended per
      computer:http://support.apple.com/kb/ht3887#howmany
      <http://support.apple.com/kb/ht3887#howmany>

      <http://support.apple.com/kb/ht3887#howmany>


      My computer is asking for passcode when I attempt to pair it with
      Muse, what should I enter?


      If your computer asks you for a PIN, type in "1234".


      I can't seem to get good signal with my Muse!

Fit is very important for good signal quality. It is essential that the
headband be flat and firmly pressed against your forehead with no hair
whatsoever in the way. For the ear electrodes, make sure they are
contacting as much skin as possible. If you have long hair, it can help
a lot to tie it back into a ponytail or bun. If you wear glasses,
consider removing them. The exercises in the Calm app require you to
keep your eyes closed, in any case, so you won't require your glasses
until after.

Dry skin can also cause bad signal. Consider gently cleaning your
forehead and around your ears to potentially improve the connection.

Make sure the Muse electrodes are clean. You can do this buy gently
wiping them with a cloth dipped in a moderate amount of rubbing alcohol
or hand sanitizer.

Lastly, it is important to sit still for 20-30 seconds after adjusting
the headband. The signals from Muse will take a little while to settle
down after the headband has been moved. The skin-electrode connection
improves gradually over time as a small layer of moisture builds and the
electrochemical state reaches an equilibrium. Every time the headband
moves relative to the skin, this equilibrium is somewhat interrupted and
must be given time to recover.

If you continue to have signal quality issues after following the above
instructions, please contact community@interaxon.ca
<mailto:community@interaxon.ca>.


      How much data is produced per minute?

If storing data to disk, Muse generates about 400KB per minute using
220Hz/4 channels.


      What is the time precision accuracy of the data?

The Muse SDK has a 2ms accuracy.


      How do I synchronize to an external clock? 

To get this working, you would synchronize the clocks on each computer
Muse is connected to. Usually you would use NTP for this, which is made
to sync clocks on different computers. This is available on all major
operating systems.


      When will the next update to the SDK be released?

As soon as it is ready! Sign up for the dev mailing list to get the news
ASAP: http://eepurl.com/9M2P1 <http://eepurl.com/9M2P1>


      I want to know more about EEG and BCI, what are some good learning
      resources?

Check out our list of helpful books and websites on BCI, EEG,
neurofeedback, event-related potentials and more in our Intro to Brains
<https://sites.google.com/a/interaxon.ca/muse-developer-site/intro-to-brains>.




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