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31316: DescriptionAudio IC Development Tools AP-16 Audio Player; CategoryDevelopment board/suite/development tools; File Size1MB，11 Pages; ManufacturerParallax; Environmental Compliance

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31316 Overview

Audio IC Development Tools AP-16 Audio Player

31316 Parametric

Parameter Name	Attribute value
Product Attribute	Attribute Value
Manufacturer	Parallax
Product Category	Audio IC Development Tools
RoHS	Details
Product	Development Boards
Type	Audio Player
Operating Supply Voltage	12 to 18 V
Dimensions	114.3 mm x 107.95 mm
Operating Supply Current	150 mA
Factory Pack Quantity	1

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AP-16+ Audio Player

Version 1.0

Document Version: 1.30

●

15 JUL 2010

DESCRIPTION

Professional prop builders know a secret: audio is more than half of the experience of a high-quality prop.

Until now, most consumer-level audio boards lacked some real professional features -- features like quality

amplification, stand-alone randomization of sounds, relay control for automated output while audio plays, and

easy connections for manual and remote control. The AP-16+ is a high-quality, stereo WAV file player

designed for serious prop builders of all levels. It’s very easy to use, yet rich in features, and is easily

integrated into props and displays.

PRODUCT APPLICATIONS

•

Props and holiday displays

Sophisticated audio annunciation for small-scale industrial control

FEATURES & BENEFITS

•

Plays stereo WAV files (16-bit, PCM, up to 44.1kHz)

Files stored on standard SD card (FAT or FAT32 format)

24 stand-alone files under manual control

Optional, auto-playing ambient file (AMBIENT.WAV)

Manual input via (normally-open) dry-contact, (optically isolated) 12-24 VDC input, or PIR sensor

Eight, dry-contact auxiliary inputs

Relay output active when file plays (N.O. and N.C connections provided)

Pre- and post-play delay potentiometers (manual mode, only)

Dual 20W amplifiers (one per channel)

TTL serial control for connection to host microcontroller

- unlimited files under serial control

User-configured baud rate (2400 or 38.4k) for serial control

User-configured address allows up to four AP-16+ boards on one serial connection

Easily updated as new features become available – update loads from SD card

Size: 4.25” x 4.50” (107.95mm x 114.30mm)

Four, 0.135” (3.4mm) mounting holes

EFX-TEK

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www.efx-tek.com

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teamefx@efx-tek.com

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.

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

Audio Outputs

The AP-16+ provides terminal outputs for 4Ω or 8Ω 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.

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.

AP-16+ Audio Files

The AP-16+ plays PCM encoded, 16-bit, stereo WAV files at sample rates up to 44.1kHz. Monophonic files,

or those with a different bit depth, will need to be converted.

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.

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

Background file that will play between other files when ambient loop switch ( ) is set

to ON. For best results this should be a “loopable” file and generally be at a lower

level than other audio files.

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

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.

The AP-16+ inventories SFX files on power-up; there is no requirement for all 16 SFX files to be present.

Using the auxiliary manual inputs (IN1..IN8) the AP-16+ can play any of eight files, named AUX01.WAV

through AUX08.WAV. Note that when the EN (audio stop enable) option switch is set to ON, IN8 will serve as

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a stop input and AUX08.WAV will not play in manual mode.

AUX01.WAV

AUX08.WAV

Corresponds to manual input on IN1

Corresponds to manual input on IN8 (when EN option is off)

AP-16+ Audio Files - Serial Control Mode

When using an external controller like the Prop-1, Prop-2, or Prop-SX, the AP-16+ can play any number of

files that are stored on the SD card. The only requirement is that the files are named using DOS 8.3 naming

convention, that is, the name of the file is eight characters or less, followed the the “.WAV” extension.

File naming examples:

BELL.WAV

TELEPHONE.WAV

WOLF.MP3

Good file name

Bad file name – too many characters in name (9)

Bad file name – extension is incorrect; format probably incorrect as well

Manual Control

An SFXnn.WAV file can be started by:

✔

Using a normally-open push-button/switch across the SWITCH INPUT terminals (E)

Applying a 12- to 24-volt DC voltage to the 12-24V INPUT terminals (F)

Connecting a PIR or compatible sensor to the PIR input header (G)

Pressing the START button (H)

Manual control of an SFXnn.WAV file has two modes: 1) standard, and 2) random. The mode is controlled by

the position of the Random (?) option switch. When the random option switch is set to OFF the file to be

played is set by the AUDIO SELECT switch.

When the the Random (?) option switch is set to ON the AP-16+ will randomly select a file between

SFX00.WAV and the file set by the AUDIO SELECT switch. For example, if the Random option switch is set

to ON and the AUDIO SELECT switch is set to 7, the AP-16+ will play one of the files in the range

SFX00.WAV through SFX07.WAV. Note that the Random option uses internal logic so that all files within the

selected range are played before any is repeated, and the same file will not play back-to-back.

An SFXnn.WAV file will play until finished, even it another trigger input (dry contract, DC, sensor, or START

button) is detected. To stop an SFXnn.WAV file in progress:

✔

With the EN (autio stop enable) option switch on, press a button connected between 3V3 and IN8

Send an “X” command through the TTL serial link

Start an AUXnn.WAV file using one of the INx inputs

An AUXnn.WAV file can be started by connecting a normally-open push-button/switch between the 3V3

terminal and an INx (IN1..IN8) terminal. Note that the auxiliary inputs will override the current file if the

selection differs from the file presently playing, and are not subject to pre- and post-play delays (see below).

For example, if AUX01.WAV is playing and a button connected to IN2 is pressed, the AP-16+ will immediately

stop AUX01.WAV and start AUX02.WAV. If, while AUX02.WAV is playing, another input on IN2 is detected,

this input will be ignored. When the audio stop enable (EN) option switch is ON, IN8 serves as an audio stop;

AUX08.WAV – even if present – will not play under manual control

Pre-Play and Post-Play Delays

For stand-alone projects the AP-16+ includes potentiometers for setting pre- and post-play delays applied to

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manually-started SFXnn.WAV files (AUXnn.WAV files are not affected). The pre-play delay, 0 to 30 seconds,

is set by the PRE potentiometer (P). During this delay the STATUS LED will flash between yellow and green,

and the AP-16+ will remain silent (AMBIENT.WAV will be stopped if it was playing).

The post-delay potentiometer (Q) can be used to prevent immediate re-triggering of audio; this is especially

useful when using the AP-16+ for stand-alone audio and prop control. The post-play delay, 0s to 3 minutes, is

set by the POST potentiometer (Q). During this delay the STATUS LED (S) will flash between red and green,

and if the ambient Loop switch ( ) is set to ON, AMBIENT.WAV will be re-started during the post-play delay.

Relay Control Output

The AP-16+ has an on-board relay with normally-open and normally-closed contacts (R). The relay is

automatically activated when an audio is played. The relay is not activated for AMBIENT.WAV, or during the

pre- and post-play delay periods.

Configuration Switches

The 6-position configuration switch controls many aspects of the AP-16+ behavior; the table below describes

the function of each switch.

Sets the baud rate for serial control (see below). When OFF, the baud rate is 2400 (Prop-1); when ON

the baud rate is 38400 (Prop-2, Prop-SX).

Controls the upper bit of the AP-16+ address for serial commands (see below).

Controls the lower bit of the AP-16+ address for serial commands (see below).

When ON, the EN option switch converts IN8 from a manual control input (for AUX08.WAV) to a “audio

stop” input for any file (except AMBIENT.WAV when playing). When enabled the Audio Stop function

will stop the file regardless of state: pre-play delay, playing, or post-play delay.

When ON, the ? switch activates random mode for SFX files. The file played will be from SFX00.WAV

through the file indicated by the AUDIO SELECT switch.

When ON, the ambient Loop switch causes AMBIENT.WAV (if on the SD card) to be played while the

AP-16+ is idle.

Serial Protocol

The AP-16+ serial connection conforms to the Parallax AppMod bi-directional communications protocol, which

operates at TTL (0 to 5 VDC) using “open-true” baud mode to enable daisy-chaining devices. All exchanges

are initiated by the host controller. The format of host communications to the AP-16+ is as follows:

"!AP16", address, command

{ , data }

EFX-TEK

●

www.efx-tek.com

●

teamefx@efx-tek.com

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