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How to use the ap-16? — Parallax Forums

How to use the ap-16?

windwind Posts: 6
edited 2011-01-20 16:46 in General Discussion
I use the HomeWork Board to control the ap-16,
Power supply is 12V 3A,
Circuit diagram and the ap-16 switch, as shown
sd card to store the wav file, such as file
But always show "whoops, no file!" message in the Debug Terminal, as shown
What is wrong with this?
Circuit diagram.gif
540 x 370 - 48K
rar
rar
WAV.rar
560K
debug.gif
562 x 678 - 12K

Comments

  • FranklinFranklin Posts: 4,747
    edited 2011-01-18 20:47
    What's on you SD card? Can you play it on your computer?
  • windwind Posts: 6
    edited 2011-01-18 21:36
    There are two files in the SD card (wolf.wav & sfx01.wav),
    I can play it on my computer.
  • bsnutbsnut Posts: 521
    edited 2011-01-19 02:06
    I see we are having some problems with JonnyMac's great product:smile:. From what I see the setup is correct so far. I have some basic questions for you.
    1. What type of SD card are you using? Some of the cheap cards don't work very well.
    2.Are the WAV files (16-bit, PCM, up to 44.1kHz) and stored in FAT or FAT32 format? 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 using a freeware program called Audacity and you can it this link http://audacity.sourceforge.net/

    The user manual can be downloaded from the Parallax and also can be downloaded from EFX-TEK as well, which covers the use of the AP-16. I will be happy to help you in this forum or you can visit the EFX-TEK support forums where this topic is covered as well and here's the link.
    http://www.efx-tek.com/php/smf/index.php?board=28.0
  • Shawn LoweShawn Lowe Posts: 635
    edited 2011-01-19 09:25
    Can you post your program?
  • bsnutbsnut Posts: 521
    edited 2011-01-19 13:29
    From what I see, wind is using the test program that JnnyMac writes for all his products.
  • Shawn LoweShawn Lowe Posts: 635
    edited 2011-01-19 14:27
    bsnut wrote: »
    From what I see, wind is using the test program that JnnyMac writes for all his products.

    yeah, looking at it he is getting communication with the AP-16. I would say it may be a problem with your file names? Are they the same as in the program?
  • bsnutbsnut Posts: 521
    edited 2011-01-19 17:45
    I stated this in my first post what the common problems are and I see it in the EFX-TEK.com support forums, were I post in all the time.
  • windwind Posts: 6
    edited 2011-01-19 18:57
    Thanks for reply.
    I use the test program.
    SD cards are only two files, as shown.
    SD card is "TRANSCEND, 1G", as shown.
    The WAV files are (705kbps, 16-bit, PCM, 44.1kHz, 1 channel) and stored in FAT format.
    BS2
    BS2
    AP-16_Test.BS2
    6K
    SD_card_TM_1G_530x400_product.jpg
    530 x 400 - 85K
    wav file name.gif
    408 x 105 - 3K
  • bsnutbsnut Posts: 521
    edited 2011-01-20 01:36
    Your problem is related to SD card transfer rate. It's how fast the card transfers it's files. The cards that work well, are the ones with a fast transfer rate. The way you find out is, SD cards have a "C" with a number inside. The low number like a 2 will have a slower transfer rate and the higher number like a 10 will have a faster transfer rate.

    I hope this helps you out. And later on I will post the link where we talked about this on EFX-TEK support forum.
  • bsnutbsnut Posts: 521
    edited 2011-01-20 14:32
    Wind,

    Here is the link to the topic on EFX-TEK support forums that talks about your problem that have.
    http://www.efx-tek.com/php/smf/index.php?topic=1637.msg9578#msg9578
  • windwind Posts: 6
    edited 2011-01-20 16:46
    Bsnut,
    Thanks a lot for the info,I will try it.
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