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WAV Trigger (Open hardware)

4 years ago 2124
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Description

Description: The WAV Trigger is a unique high-fidelity polyphonic audio player with surprising capabilities. Supporting up to 2048 uncompressed 16-bit, 44.1kHz wav files – the same quality as an audio CD – the WAV Trigger can play and mix up to 14 stereo tracks simultaneously and independently, with very low latency. Tracks can be controlled via 16 programmable trigger inputs, or by using a native serial control protocol or even MIDI.

Trigger inputs can be connected directly to switches and buttons, or to digital outputs from sensors or another microcontroller. Alternate functions can be specified using a free cross-platform GUI application, and allow triggers to play sequential or random tracks, pause and resume groups of tracks and even control volume. An Arduino library allows for complex serial control like real-time mixing, starting multiple tracks in sample-sync and smooth cross-fading between tracks.

On-board sample rate conversion allows for smoothly changing playback speed/pitch from 0.5x to 2x. in real-time.

MIDI allows you to use the WAV Trigger as a polyphonic sampling synthesizer to play your own sounds from any MIDI keyboard controller. MIDI Channels and Note numbers are mapped to track numbers, and MIDI Controllers adjust volume as well as attack and release times. MIDI Program Change is supported to switch between up to 16 banks of 128 sounds. The WAV Trigger audio engine even implements, pitch bending, voice stealing (oldest playing voices are used for new MIDI Notes when all 14 voices are being used), note attack (fade-in), note release (fade-out) and latency averages 8 ms.

The WAV Trigger supports both SDSC (up to 2GB) and SDHC (up to 32GB) type microSD cards.

Features:

Supports up to 2048 uncompressed 16-bit stereo WAV files up to 44.1kHz – CD quality Polyphonic! Play and mix up to 14 stereo tracks independently and simultaneously Sample-accurate starting and playback of up to 14 parallel stereo tracks Trigger-to-sound delay: 8 msecs typ, 12 msecs max MIDI control: Velocity-sensitive triggering of up to16 banks of 128 tracks Real-time playback rate control and MIDI Pitch Bend Pause and resume individual or groups of tracks. Multiple random trigger ranges True line-level stereo output: 2.1V RMS ground centered, 100dB SNR On-board mono audio amplifier and speaker connector: 2W into 4 Ohms, 1.25W into 8 Ohms 16 trigger inputs are individually adjustable for contact closure, 3.3V or 5.0V control Trigger inputs can be individually inverted, and/or set to be edge, latched or level sensitive Volumes adjustable from +10dB to -70dB in 0.5dB increments Firmware volume fades (attacks & decays) and cross-fades A dedicated “Play” status digital output pin 3.3V and 5.0V output pins Extensive serial control. Arduino library available. Pin compatible with SparkFun FTDI Basic

GitHub Sparkfun link:https://www.sparkfun.com/products/13660

Documents

wavtrigger_v11 SCH

wavtrigger_v11 PCB

BOM

ID Name Designator Footprint Quantity
1 5.5x2.1mm Barrel J1 POWER_JACK_SMD_OVERPASTE_REDBOARD_0603 1
2 STM32F405RG U4 TQFP64 1
3 10uF C2 0805 1
4 MIC5323-3.3 U2 SOT23-5 1
5 2.2uF C3,C5 0805 2
6 0.1uF C4,C9,C10,C13,C15,C18,C19,C21,C22,C23,C26 0603-CAP 11
7 10uF C1 1210 1
8 1uF C11,C30,C31 0603-CAP 3
9 2.2uF C14,C20,C24,C25 0603-CAP 4
10 4.7uF C12 0603-CAP 1
11 8MHz Y1 HC49UP 1
12 33pF C16,C17 0603-CAP 2
13 47K R1,R2,R3,R4,R5 0603-RES 5
14 PCM5100 U5 PW_R-PDSO-G20 1
15 10uF C27 0603-CAP 1
16 2200pF C28,C29 0603-CAP 2
17 470 R6,R7 0603-RES 2
18 LM4990 U6 S-PDSO-G08 1
19 10K R8,R10,R14,R16,R17,R20 0603-RES 6
20 22K R9 0603-RES 1
21 AUDIO-JACK J2 AUDIO-JACK-3.5MM-SMD 1
22 USD-SOCKET J3 MICRO-SD-SOCKET-PP 1
23 100 R15,R40,R39,R38,R37,R36,R35,R34,R33,R11,R12,R13,R18,R21,R22,R23,R24 0603-RES 17
24 330 R19 0603-RES 1
25 LED LED1 LED-0603 1
26 M02 J5,J9 1X02 2
27 M06 J4 1X06 1
28 STAND-OFF STANDOFF1,STANDOFF2,STANDOFF3,STANDOFF4 STAND-OFF 4
29 M08X2 J7,J6 2X8 2
30 DNP R41,R42,R43,R44,R45,R46,R47,R48,R25,R26,R27,R28,R29,R30,R31,R32 0603-RES 16
31 M04 J8,J10 1X04 2
32 SOLDERJUMPER SJ2 SJ_2S-NO 1
33 OSHW-LOGO LOGO1 OSHW-LOGO-L 1
34 LOGO-SFE LOGO2 SFE-NEW-WEBLOGO 1
35 SOLDERJUMPER SJ3,SJ4,SJ5 SJ_2S-TRACE 3
36 SWITCH-SPDT S1 SWITCH-SPST-SMD-A 1
37 SWITCH-MOMENTARY-2 S2 TACTILE_SWITCH_SMD 1
38 240 R49 0603-RES 1
39 715 R50 0603-RES 1
40 V_REG_LM1117 U1 SOT223 1
41 FRAME-LEDGER FRAME2 CREATIVE_COMMONS 1
42 .39uF C6 0603-CAP 1
43 TEST-POINT TP1 TP_15TH 1
44 SFE_LOGO_FLAME LOGO4 SFE_LOGO_FLAME_.2 1
45 FIDUCIAL FID1,FID2 FIDUCIAL-1X2 2

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