This page explains how to operate G.I.M.I.C motherboard.
You need the items below to operate G.I.M.I.C:
To connect G.I.M.I.C to your PC. G.I.M.I.C also draws power from USB.
A low-quality cable may cause signal degradation or power loss, which in turn can lead to unexpected malfunctions.
Use a cable that can fast-charge a smartphone to avoid such troubles.
For reference, below are the cables we employed during the development.
Straight
Motorola ECOMOTO : SKN6378A
Right angled
Sony Ericsson : EC600L
Note that some cables shipped with smartphones or tablets are "charge-only", i.e. unable to transfer data.
Make sure that your cable offers data transfer too.
From which G.I.M.I.C reads song files when in standalone mode. You don't need one when your G.I.M.I.C plays songs on your PC via USB.
G.I.M.I.C can handle SD/SDHC cards with up to 32GB capacity (SDXC cards are unsupported).
We have confirmed that UHS-I cards can be used, but they will function in compatibility mode, since G.I.M.I.C doesn't support UHS-104.
For reference, below are the cards we employed during the development.
SanDisk MobileUltra microSDHC UHS-I 8GB : SDSDQY-008G-J35A
SanDisk Extreme Pro microSDHC UHS-I 8GB : SDSDQXP-008G-J35
SanDisk Extreme Pro microSDHC UHS-I 16GB : SDSDQXP-016G-J35
G.I.M.I.C outputs audio signals through a 3.5mm mini-stereo jack. Apply adaptors as needed.
Recommended impedance range is from 16 Ω to 300 Ω for the Pro/Std motherboard, 16 Ω to 32 Ω for the Lite motherboard.
In addition, the pro model (GMC-MB2PRO) can be connected to a breakout cable, which will provide an output through 6.5mm phone jack. See below for details.
This provides additional I/Os, namely:
We recommend using either the 6.5mm phone jack or the line-out, since they give you a better sound quality than the 3.5mm mini-stereo jack.
Be sure to use ALVA Babyface (BF-BOCMKH). Use of other cables is unsupported.
Drawing power from an external supply, you can avail yourself of G.I.M.I.C's full potential.
Use an AC adaptor with an output voltage of 5V, a currency of 1000mA (or above), connector type of EIAJ-02, center positive.
Do not use an AC adaptor with an output voltage exceeding 5.2V, as it can cause permanent damage to G.I.M.I.C.
For reference, below is the AC adaptor we employed during the development.
AC adaptor for SONY PSP1000/2000/3000 series: PSP-100
The picture is of a prototype and has some minor differences compared to the actual product.
1: USB Port
USB Micro-B Port for power supply and connection to a PC.
2: DC IN (only in GMC-MB2PRO)
Insert here the power extension cable (included in the GMC-MB2PRO shipment), to which your AC adaptor can be connected.
3: microSD card slot
4: Breakout connector (only in GMC-MB2PRO)
5: Reset Switch
Resets G.I.M.I.C to the initial state, i.e. the state it's in at the time of start-up.
6: 3.5mm mini-stereo jack
Connect your headphones / loudspeakers here.
7: Jog Wheel (or Volume Pot in GMC-MB2LT)
Std/Pro G.I.M.I.C can be controlled through this wheel by turning or pressing it.
Lite edition has a volume pot in place of the jog wheel. Turning the pot controls the output level of the 3.5mm jack.
8: Extention I/F (currently not in use)
To connect accessories to be released in the future.
9: Host I/F
Connect a sound chip module to this port.
10: USB Standard-A port (only in GMC-MB2PRO; currently not in use)
For a future project to control USB devices from G.I.M.I.C.
Supplies 100mA of output current.
11: Front Panel Header
To be used with Abee aluminium case.
1: Power Switch
2: The POWER & the STATUS LEDs
Indicate the current power state and operation mode.
3: Analog IN Jack
To feed in the analogue output from modules.
4: Expansion Module Slot (currently not in use)
To be used for future expansion.
Note that it's NOT a slot for a button cell battery.
1: MIDI I/O (currently not in use)
For future project for G.I.M.I.C to be used as a MIDI instrument.
2: Line I/O
We adapted BF-BOCMKH for our particular use, so that the "Line IN" actually works as another set of OUTPUTS.
Output signal from the "Line IN" port bypasses G.I.M.I.C's internal preamplifier. This is better suited for use with a high quality audio interface.
3: 6.5mm phone jack
Use this instead of the 3.5mm jack on the motherboard for a better output.
4: Connector to GMC-MB2PRO
There are a few steps to follow before you start up your G.I.M.I.C for the first time.
Please update the G.I.M.I.C firmware to the latest version, following the instruction here.
For your PC to recognize G.I.M.I.C as a USB Device, it either needs to be running Windows8, or have the G.I.M.I.C driver installed. If you are using Windows7 download and install the driver from the link below.
You need to install c86ctl to be able to control G.I.M.I.C from third-party applications.
Download the latest version from the link below.
Also, c86ctl depends on Visual C++ 2010 Runtime. Install the package below, and update to the latest available version using MicrosoftUpdate. Note that you need to install 32-bit version of the components (files with _x86 in their names) regardless of your OS version.
You can find song files to be used for test purposes here.
When G.I.M.I.C is in USB mode, files can be played from third-party applications. Here is the list of applications that support G.I.M.I.C.
G.I.M.I.C can also play songs without the aid of external software. In that case, the song files must be contained in the SD card inserted in G.I.M.I.C's card slot. If your SD card has a capacity of 16GB or above, it is recommended to initialize the card before copying songs, with allocation unit size set to 4096 Byte or 8192 Byte, file system FAT/FAT32, for more efficiency. *1
G.I.M.I.C can operate in two modes: Standalone mode and USB mode. At the time of start-up, G.I.M.I.C looks for an SD card in its slot. If it finds one, it will start operating in Standalone mode. Otherwise it will operate in USB mode.
The way G.I.M.I.C is controlled varies depending on which mode it is operating in. You will find detailed information later in this article.
Connect G.I.M.I.C to a PC via USB, or to an external power supply through an AC adaptor (Pro only). When connected, G.I.M.I.C will be in standby mode. GMC-MB2PRO's relay gives one small click.
This section is an abstract from a more fully detailed description in Japanese. You can read the original here.
Up-arrow move the cursor up Down-arrow move the cursor down Right-arrow play the next song Left-arrow play the previous song PageUp scroll up one page PageDown scroll down one page HOME move to the previous folder END move to the next folder ENTER play song file / open folder BackSpace move up one folder F1 toggle AUTO (next song is automatically played when on) F2 stop playing F3 +1 to the number of times songs are looped F4 -1 to the number of times songs are looped F5 tempo up F6 tempo down F7 change playback mode (normal/repeat current folder/shuffle current folder) F8 go to the setup screen
This section is an abstract from a more fully detailed description in Japanese. You can read the original here.
Parallel Output | ||
STATUS LED | off | on |
Line IN | unused | audio signals from the module |
Line OUT | all audio signals | PCM sounds |
Press the power switch to cut off the power. G.I.M.I.C will turn back to standby mode. Std/Pro motherboard memorizes the volume setting.
G.I.M.I.C continues to consume a small amount of power while in standby mode, so unplug the USB cable and/or the AC adaptor as needed.
Line OUT is generally better suited for connection with audio equipment. It outputs PCM sound from motherboard and other audio signals from the module mixed together, which come through G.I.M.I.C's preamplifier.
Line IN is better suited for connection with a high-spec audio I/F, since the output bypasses G.I.M.I.C's preamplifier.