Wednesday, August 28, 2019

Playing Midis via Bluetooth from my Mac to my Disklavier Mark IV

 I connected the mi1v2 Bluetooth midi device to my Disklavier Mark IV this evening.

I purchased the Bluetooth midi device from Amazon at

 Description of device:
Wireless technology    Bluetooth Low Energy
Bluetooth LE MIDI Profile    Apple Bluetooth LE MIDI (iOS 9)
Connectors    1 x MIDI IN (5pin-DIN)
1 x MIDI OUT (5pin-DIN)
Switch、Indicator    1 x Hall element Switch
1 x Magnet
1 x white LED
Power Supply    From MIDI Out 3.3V-5.0V
Compatible iOS devices    iPad (3rd, 4th), iPad Air2, iPad mini, iPad mini 2, iPad mini 3,
iPhone(4s,5,5s, 6, 6plus, 6s, 6splus) iPod touch (5th, 6th)
Compatible OS    iOS8, iOS9, OSX (Yosemite, El Captain)
Firmware Update    On the air by using Piano Jukebox
iOS Apps for mi.1    mi.1 connect : bridges mi.1 and Core MIDI music apps
Piano JukeBox : Simple SMF player, firmware updater
Power consumption    7 mW (when MIDI OUT is 3.3 V)
25 mW (when MIDI OUT is 5 V)
  • Turn Piano off.
  • Connected mi1vi2 Bluetooth devices input/output pins to I/O center at front of piano when piano off.  There are arrows on the device to aid in connecting properly.
  • Then turned piano on and made sure piano still worked.
  • Used instructions from
  • Updated the device using Piano Jukebox app on iPhone  (be sure to get this app for your iPhone to use for update…
Firmware update
Updating the firmware is recommended to ensure that the mi.1 can be used in the most optimal condition. To do this, please download the dedicated iPhone/iPad application "Piano Jukebox" (free) from the App Store.
1. Launch the Piano Jukebox app
2. Tap the wheel icon and select 'Firmware Update'
3. Turn on the MIDI instrument to which the mi.1 is plugged, then tap the 'OK' button
4. Tap the 'Upload' button when it becomes available (blue) †
5. Keep the MIDI instrument turned on while updating the firmware
6. When the firmware has uploaded successfully, a message will be shown .
How to connect to iPhone/iPad
The connection between mi.1 and the iOS is made by Bluetooth Low Energy MIDI. The connection is managed in the “Bluetooth Midi Devices” List which the Piano Jukebox or some other MIDI apps have.
Preparation: Turn on the device to which the mi.1 is connected
1. Launch the Piano Jukebox app
2. Tap the mi.1 icon in the menu bar
3. Tap the “Not Connected” next to the mi.1 in the list.
4. You can now use the Piano Jukebox and other MIDI apps, such as GarageBand, on your iPhone

How to connect to Mac
1.For the connection between Mac, go to Application/Utilities folder and open Audio MIDI Setup.
2. Launch the "Audio MIDI Setup" tool
3. From the titlebar menu, select Window > Show MIDI Studio
4. Double-Click the Bluetooth Icon
5. Click the "Connect" button
6. If the button changes to "Disconnect", the mi.1 has connected successfully
7. MIDI apps can now recognise the mi.1 Bluetooth as a MIDI device.

Next I needed to decide on the best option for playing midis on my Macbook Pro.  I decided to purchase MidiYodi which works with this Bluetooth device, set up using Audio Midi Setup on Mac laptop.  This is a pretty good midi player for my current Macbook Pro running High Sierra  10.13.6.  I decided on this midi player because of the reasonable cost, the extensive online manual and the ability to create and save playlists.  It also has some editing capabilities.  MidiYodi can be found at:

Other Midi software that I tried out that worked with this Bluetooth device connected to my Disklavier Mark IV included:
Midikit is trial only, would need to purchase the version for 11.99 - good for editing titles and channels. No playlist capability.  Make sure connected to device by: looking under Midikit menubar select Midi Settings. Click on Midi port.  And the mi 1 bluetooth device should show up
Midiswing worked and needed to make sure to select output: Bluetooth (Quicco Sound Corp.) 2
Sweet Midi which has playlist capability. $29.95 USD

Most of these played midis using the Bluetooth device  but lacked playlist capabilities. In order to get some of these to work, I had to go to preferences or audio setup or midi settings in the individual apps and make sure that Bluetooth was selected.

Friday, July 19, 2019

How to convert m4b files to mp3 files

How to convert m4b files to mp3 files

I downloaded an audio book today to my Mac laptop.  The file format for the audi0 book was m4b.  I had planned to use airdrop to send to my iPhone to play with my MP3 books app on my iPhone.  When I attempted the airdrop the only options I was allowed was to GoodReader.  That was fine, but really wanted to keep a copy in MP3 Books library with my other road trip audio books.

As I suspected that MP3 Books app would only play mp3 file format, I needed to convert the m4b files to mp3 file format. 

The m4b files were easy enough to drag into iTunes.  But, then I couldn't find them in my song list.  I didn't realize that iTunes has been reorganized in the latest update.  So I searched for the title of book and found them in the audio book section of iTunes.

I selected each chapter or part individually, highlighting the name of the part or chapter. 

Then, I selected File>Convert>Create mp3 version

After each of the parts or chapters where converted to mp3 format, I then selected each part and dragged from iTunes to my desktop on the laptop.  This gave me all the mp3s that I then put into one folder.  I named the folder with the name of the book and author.

Once in the folder, I could connect my iPhone to my laptop with cable. I then used the method for sharing files via File Sharing to my MP3 Books app from iTunes.  If you need a refresher on how to share files with certain apps on your iPhone from iTunes, check Apple's support info at

 Now, I have a new audio book for my road trip ready on my iPhone. 

Saturday, July 13, 2019

How to Calibrate Your Disklavier using PRC remote

How to Calibrate Your Piano using PRC remote (Notes from my husband)

- Quit the interface on the PRC remote and instead run the Service program, which can be found in the main set of PRC remote program icons along the bottom of the PRC screen.

- You'll see a white screen with 3 text options, none of which are particularly exciting.

- Slide down the keyboard cover on your PRC remote, and hold the D, M, and P keys down together (they don't need to be pressed at the same time, just held down together).

For our Disklavier Mark IV purchased September 2005 (Yamaha DC7M4t) there is a definite sequence required for the D, M and P keys. 
After selecting the Service Center from the main menu you will see three menu items [1. Post delivery check, 2. Program Versions, 3. Pedal Calibration]. Then depress and hold each of the 3 keys (i.e. D, then M, then P) in that order and very rapidly.

Mark, a technician at Yamaha, suggested the following technique for rapidly depressing and holding these three keys:
         1. Position two fingers on your left hand over the the D and M keys.
         2. Position one finger on your right hand over the the P key.
         3. Then in very rapid succession press and hold the D key, then the M key, then the P key. It has to be rapid enough so that “repeat key” beeps are not heard after pressing the “D" and “M" keys. It is tricky to get the timing right. It took me at least 20 or 30 attempts (perhaps more) before I was successful. But when you do get the sequence timing fast enough you will immediately see the menu change. 

- You should see the Service options expand greatly into a maintenance mode-like menu.
• After successfully getting the D,M, and P sequence correct, select “Disklavier Piano System
• Then Select “Piano Calibration-Full” 
• Then Select “Calibr. in Series w/ GS check”  which will begin the full self-calibration process. 
Note (1): This self calibration process will take about 14 minutes total with some very loud piano notes played.  
Note (2): GS meaning the gray-scale sensors.

- Your Mark IV will undergo a large number of self-calibrations, which include how much voltage is needed to depress the pedals to various extents, how much voltage is needed to make each key play at a certain volume, etc. The calibration process makes a lot of (very cool) sounds... so don't start it unless your housemates don't mind a lot of increasingly loud piano playing.

- If your Mark IV passes each set of calibrations, it will play a single C-Major chord; if it fails, it will play a c-minor chord. You'll get text messages throughout the roughly 15 minute process as well.

- At the end, the Disklavier writes all of the newly-derived parameters to a file that is used to optimize playback.

My husband found this process to be very helpful in getting the Mark IV optimized; although, the last time the piano tuner was here he went through a procedure to calibrate the piano.

Aug 9, 2019 We tried to calibrate our Mark IV using the method above, but the PRC remote  that came with the piano did not seem to respond when we held down the D, M, P keys together.  So we rebooted the PRC device and also turned the Disklavier piano off and back on.  The keys worked fine and our calibration was performed.  Not sure which helped -  reboot of PRC or turning Disklavier piano off and on again.  It is easy to do both.  In any case,  performing the calibration was successful.