Open Panzer Sound Card with TCB

The Open Panzer project is working on their own version of a sound card. The sound card is in beta-testing and is NOT available for purchase yet.

NOTE!

The instructions on this page apply to use of the sound card in combination with the TCB (Tank Control Board).

The sound card can also be used in stand-alone mode when controlled directly through standard RC signals but the instructions for that application are different. For instructions when using the sound card in RC mode without the TCB: Click Here

General Features

Open Panzer Sound Card The sound card is actually made up of two components. First, a PJRC Teensy 3.2 is used as the onboard processor. The Teensy is then plugged into a socket on our custom carrier board that adds a Micro SD card slot (max 32 GB), a Maxim 9768 10 watt mono amplifier, and headers for external connections.

  • Supports 16 bit 44,100 Hz WAV files (CD quality)
  • Up to 6 simultaneous sounds can be played at once from the memory card - 2 reserved for engine, 4 for effects. However if you are using track overlay sounds note that they will reserve 2 slots, leaving only 2 remaining for simultaneous effects.
  • Volume control - either with a physical potentiometer or directly from a knob on your transmitter. In fact you can use both volume control sources and the card will intelligently respond to whichever control is currently being adjusted. You can also adjust relative volumes of engine, track overlay and effects from within OP Config.
  • Three-part sounds for various effects such as barrel elevation, turret rotation, machine gun fire, and others - this permits a distinct sound to be played at the start of the effect, then a separate looping portion, then a closing sound. The firmware is intelligent enough to determine if the special start and ending sounds are present or not, if you don't want to use them just leave them off the memory card and the looping portion will still play.
  • Support for hot and cold start engine sounds.
  • 12 custom user sounds in addition to all the usual model sound effects.
  • Two banks of 20 sounds each that can be controlled like a typical playlist, for example play next, play previous, play random, etc…
  • Some sounds support multiple versions, for example you can assign up to 5 distinct idle sounds and the card will choose a different one each time the vehicle returns to idle. But if you don't have 5 idle sounds don't worry, the firmware is smart enough to automatically use as few or as many as you put on the memory card.
  • Sound functions are identified automatically by the file name, see below for a complete table.

Micro SD Card Notes

SanDisk Ultra MicroSD Not all SD cards are created equal. To get reliable simultaneous sound performance, we recommend using SanDisk Ultra SD cards such as these. They can be any capacity up to 32 GB. Format should be FAT32.

Connection with the TCB

Connections to the TCB See the image at right for an example of connection to the TCB. The sound card is controlled by the TCB through a 3-pin cable connected to the MOTOR SERIAL port on the TCB and to either one of the two serial ports on the sound card (doesn't matter which). There are two serial connectors on the sound card in order to accommodate the Scout ESC for those also using that device, serial from the TCB can enter one side of the sound card and pass through the other connector to the Scout.

There are also two battery input connections on the sound card, identical to the battery connection on the TCB. Unplug your battery from the TCB and plug it into one of the battery connections on the sound card instead, and then use a jumper cable from the second battery connection on the sound card to power the TCB.

The only other connection required is obviously the speaker. A potentiometer can also be attached to control volume, but volume can also be controlled from your transmitter.

When used with the TCB the servo output and the three light outputs on the sound card are not used for anything (the TCB has its own light and servo outputs instead). The five RC input connections are also left unused.

Mounting holes on the sound card board match the spacing of the TCB holes.

LED Key

LED Patterns for the Open Panzer Sound Card The sound card has two status LEDs, one blue and one red. On startup, the red LED will blink rapidly if unable to read the memory card, otherwise it will blink slowly until an input signal is received, either from the serial port or an RC channel. Whichever type is detected first is the mode the sound card will use until the next reboot. Once a signal is detected the red LED will turn off.

If a memory card error is indicated, turn off power to the device. Check to make sure your memory card is present and inserted all the way, and that sound files on the card are in the correct format and named correctly (see the table below for file names).

So long as the input is active the blue LED will remain solid. If in RC mode and connection is lost on all 5 channels, the blue LED will blink rapidly. If in Serial mode the blue LED may blink slowly if no command has been given for a length of time - this is not an error, it simply indicates idle status.

Test Mode

When the sound card is powered up with a jumper attached to RC input 1 such that the signal pin is held to ground, it will enter a test routine. During this mode the device will sequentially play in full each sound that it finds on the memory card, or at least each sound that it knows to look for (see the full list below). Debugging information will be printed out the USB port while this occurs. When every sound has been played it will start over from the beginning and repeat this process continuously until the jumper is removed. This can be useful in identifying which sounds the device thinks it can find, and whether they sound as you expect, etc…

Sound Files

The sound card requires basically no configuration when paired with the TCB, other than adding your desired sounds to the memory card. The sound card identifies the function of each sound by its file name, so you must name your files exactly as shown in the table below. Note we are limited to the 8n3 format, meaning file names cannot exceed 8 characters. You do not need to include every sound, any that are omitted will simply be ignored by the sound for that function.

Sound files must be saved as 16 bit 44,100 Hz WAV files. It doesn't matter if the files are in mono or stereo format, but since the card can only drive a single speaker any stereo files will be output as mono.

Turret rotation, barrel elevation and machine gun sounds have a repeating portion that will loop continuously so long as the effect is active. But you can also specify optional lead-in and lead-out sounds that will play once at the beginning or end of the sound effect. Again these are optional and can be omitted if desired.

Some parameters can be adjusted via OP Config on the Sounds tab, including relative volumes, squeak intervals, and the loop behavior of the two sound banks.


Sound Effects
Effect File Name Optional Notes
Turret Rotation turret.wav tr_start.wav
tr_stop.wav
The optional start and stop sounds will play at the beginning or end of the repeating portion, if present.
Turret Rotation
w/ Engine Off
("Manual" turret)
turret_m.wav tr_strtm.wav
tr_stopm.wav
An optional version of turret rotation sounds that will play only when the vehicle is not in the running state. If omitted, the regular turret sounds above will play regardless of the engine state. The optional start (tr_strtm) and stop (tr_stopm) sounds will play at the beginning or end of the repeating portion, if present.
Barrel Elevation barrel.wav br_start.wav
br_stop.wav
The optional start and stop sounds will play at the beginning or end of the repeating portion, if present.
Machine Gun Fire mg.wav mg_start.wav
mg_stop.wav
The optional start and stop sounds will play at the beginning or end of the repeating portion, if present.
Second Machine
Gun Fire
mg2.wav mg2start.wav
mg2stop.wav
Use these sounds for a second machine gun on your model. The optional start and stop sounds will play at the beginning or end of the repeating portion, if present.
Machine Gun Hit mghit.wav
Cannon Fire cannonf.wav
Cannon Ready reloaded.wav Notification sound to let the user know they can fire the cannon again. Actual reload time is determined by the vehicle's weight class, defined in OP Config on the Battle tab.
Cannon Hit cannonh.wav
Vehicle Destroyed destroy.wav
Vehicle Repair repair.wav
Light 1 Switch light1.wav Will play when the headlight is turned on or off (L1 port on TCB).
Light 2 Switch light2.wav Will play when Light 2 is turned on or off (L2 port on TCB).
Braking Sound brake.wav Will play automatically when vehicle is braked. To disable, simply omit the sound file.
Transmission txengage.wav
txdegage.wav
Sounds to play when the transmission is manually engaged or disengaged by the user.
Squeaks squeak1.wav
squeak2.wav
squeak3.wav
squeak4.wav
squeak5.wav
squeak6.wav
Squeak frequency is defined by the controlling device, ie the TCB (see the Sounds tab of OP Config)
Track
Overlay
Sounds
tracks1.wav
tracks2.wav
tracks3.wav
tracks4.wav
tracks5.wav
tracks6.wav
tracks7.wav
tracks8.wav
tracks9.wav
tracks10.wav
trkstart.wav
trkstop.wav
Track/tread overlay sounds when vehicle moving, with tracks1.wav played at the slowest speed and higher numbers being faster speed. Not all sounds are required, as many as are included will automatically be evenly distributed across the entire speed range. Optional start and stop sounds can be added that will play when the vehicle first begins to move or just comes to a stop.
User Sounds user1.wav
user2.wav
user3.wav
user4.wav
user5.wav
user6.wav
user7.wav
user8.wav
user9.wav
user10.wav
user11.wav
user12.wav
The TCB will let you play up to 12 user sounds which you can play/stop/repeat directly.
Sound Bank A a_bank1.wav
a_bank2.wav
a_bank3.wav
. . .
a_bank18.wav
a_bank19.wav
a_bank20.wav
Sound Bank A is a collection of up to 20 sounds, rather than controlling each one individually as in the case of user sounds, they can be controlled in the same way as a playlist on an MP3 player - play next, play previous, play random, etc...
Sound Bank B b_bank1.wav
b_bank2.wav
b_bank3.wav
. . .
b_bank18.wav
b_bank19.wav
b_bank20.wav
Sound Bank B is a collection of up to 20 sounds, rather than controlling each one individually as in the case of user sounds, they can be controlled in the same way as a playlist on an MP3 player - play next, play previous, play random, etc...
Confirmation Beep beep.wav
Engine sound file names are as follows:

Engine Sounds
Effect File Name Notes
Engine Start enstart1.wav Default/Cold start
Engine Hot Start enstart2.wav Optional, if present will use on second and subsequent starts
Engine Idle enidle1.wav
enidle2.wav
enidle3.wav
enidle4.wav
enidle5.wav
If multiple idle sounds specified, a different one will be played each time vehicle returns to idle.
Engine Idle
- Damaged State
enidle_d.wav An optional alternate idle sound that will be played when the vehicle has sustained damage in IR battle (in the manner of Tamiya).
Engine Accelerate enaccl1.wav
enaccl2.wav
enaccl3.wav
enaccl4.wav
enaccl5.wav
The acceleration sound is played as a transition from idle to moving. If multiple sounds specified, a different one will be played each time vehicle begins moving.
Engine Decelerate endecl1.wav
endecl2.wav
endecl3.wav
endecl4.wav
endecl5.wav
The deceleration sound is played as a transition from moving to stopped (idle). If multiple sounds specified, a different one will be played each time vehicle stops moving.
Vehicle Moving enrun1.wav
enrun2.wav
enrun3.wav
enrun4.wav
enrun5.wav
enrun6.wav
enrun7.wav
enrun8.wav
enrun9.wav
enrun10.wav
Engine sound when vehicle moving, with enrun1.wav being the slowest speed and higher numbers being faster speed. Not all sounds are required, as many are specified will automatically be evenly distributed across the entire speed range.
Engine Shutdown enstop.wav

Further Resources

wiki/tcb/tcbinstall/sound_op.txt · Last modified: 2018/09/10 02:51 by opadmin