31316 Parallax Inc, 31316 Datasheet - Page 3

• Manufacturer Part Number: 31316
• Description: Microcontroller Modules & Accessories AP-16 Audio Player
• Manufacturer: Parallax Inc
• Series: Propeller™r

Specifications of 31316

• Product: Microcontroller Accessories
• Data Bus Width: 16 bit
• Clock Speed: 44.1 KHz
• Operating Supply Voltage: 18 V
• Board Size: 107.95 mm x 114.3 mm
• Main Purpose: Audio, Audio Processing
• Embedded: Yes, MCU, 32-Bit
• Utilized Ic / Part: P8X32A
• Primary Attributes: Plays Stereo WAV Files (16-bit), Dual 20W Amps (1 Per Channel)
• Secondary Attributes: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Power Input
The AP-16+ is powered from 12 to 18 volts DC. DC power may be connected to via the 2.1mm power jack or
through the V+ and GND terminals located just above the power jack.
Audio Outputs
The AP-16+ provides terminal outputs for 4 or 8 speakers. Be sure to select speakers of the appropriate
wattage to handle the output, and always used enclosed speakers for the best fidelity. When not using the
speaker output terminals you should rotate the speaker volume potentiometers fully counter-clockwise (lowest
setting). If more volume is required the AP-16+ also provides line-level outputs that can be connected to an
external, stereo amplifier.
AP-16+ Audio Files
The AP-16+ plays PCM encoded, 16-bit, mono or stereo WAV files at sample rates up to 44.1kHz. WAV files
encoded at a different bit depth will not play.
AP-16+ Audio Files - Manual Mode
The AP-16+ can work with up to 24 files in manual operation, as well as an optional “background” file that will
play between selections (if enabled).
AMBIENT.WAV
lower
Using the standard manual start inputs (see below) the AP-16+ can play any of 16 files, named SFX00.WAV
through SFX15.WAV. Note that the AUDIO SELECT switch (I) is hexadecimal-encoded using digits 0 through
9, and letters A through F for 10 through 15.
SFX00.WAV
SFX10.WAV
SFX15.WAV
The AP-16+ inventories SFX files on power-up; there is no requirement for all 16 SFX files to be present.
EFX-TEK ● www.efx-tek.com ● [e-mail]
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CAUTION: Do not apply more than 18 volts DC to the power input; this is the maximum voltage
allowed by the amplifier circuitry. Note, too, that for maximum volume the AP-16+ should be
powered by 18 volts DC at 3 Amps.
CAUTION: When working in close proximity to the AP-16+’s speakers be very mindful of the
volume settings – 20W per channel can be quite loud.
NOTE: When converting files, especially from compressed formats (e.g., MP3), up-sampling is not
recommended as it can lead to audio artifacts in the form of clicks, pops, and noise in the up-
sampled file. It is best to maintain or even lower the sample rate when from compressed formats.
Background file that will play between other files when ambient loop switch (Q) is set
to ON. For best results this should be a file that cleanly loops and generally be at a
level than other audio files.
Corresponds to manual input when AUDIO SELECT switch is in position 0.
Corresponds to manual input when AUDIO SELECT switch is in position A.
Corresponds to manual input when AUDIO SELECT switch is in position F.
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