1:53 PM 6/3/2016
-----
SD Card Test
------------
SD card is connected :-)
Card type is SDHC
File system space is 15923.15 Mbytes.
SD library is able to access the filesystem

Reading SDTEST1.WAV:
  Overall speed = 1.20 Mbyte/sec
  Worst block time = 0.83 ms
    28.50% of audio frame time

Reading SDTEST1.WAV & SDTEST2.WAV:
  Overall speed = 0.91 Mbyte/sec
  Worst block time = 2.03 ms
    69.80% of audio frame time

Reading SDTEST1.WAV & SDTEST2.WAV staggered:
  Overall speed = 0.91 Mbyte/sec
  Worst block time = 1.63 ms
    56.22% of audio frame time

Reading SDTEST1.WAV, SDTEST2.WAV, SDTEST3.WAV:
  Overall speed = 0.86 Mbyte/sec
  Worst block time = 3.26 ms
    112.43% of audio frame time

Reading SDTEST1.WAV, SDTEST2.WAV, SDTEST3.WAV staggered:
  Overall speed = 0.86 Mbyte/sec
  Worst block time = 2.37 ms
    81.72% of audio frame time

Reading SDTEST1.WAV, SDTEST2.WAV, SDTEST3.WAV, SDTEST4.WAV:
  Overall speed = 0.87 Mbyte/sec
  Worst block time = 4.32 ms
    149.00% of audio frame time

Reading SDTEST1.WAV, SDTEST2.WAV, SDTEST3.WAV, SDTEST4.WAV staggered:
  Overall speed = 0.87 Mbyte/sec
  Worst block time = 2.93 ms
    101.02% of audio frame time


1:53 PM 6/3/2016
-----
>> with:: void setup() {
  SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(0) | SIM_CLKDIV1_OUTDIV2(0) | SIM_CLKDIV1_OUTDIV4(3); 
... }

SD Card Test
------------
SD card is connected :-)
Card type is SDHC
File system space is 15923.15 Mbytes.
SD library can not access the filesystem!
Please report this problem, with the make & model of your SD card.
  http://forum.pjrc.com/forums/4-Suggestions-amp-Bug-Reports
Unable to find SDTEST1.WAV on this card


1:56 PM 6/3/2016
-----
>> with:: void setup() {
  SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIV1(0) | SIM_CLKDIV1_OUTDIV2(0) | SIM_CLKDIV1_OUTDIV4(3); 
...
  // Now open the SD card normally
  Serial.println(" .... SPI_OVERCLOCK");
  status = SD.begin(10, SPI_QUARTER_SPEED); // Audio shield has SD card CS on pin 10
... }


SD Card Test
------------
SD card is connected :-)
Card type is SDHC
File system space is 15923.15 Mbytes.
 .... SPI_OVERCLOCK
SD library is able to access the filesystem

Reading SDTEST1.WAV:
  Overall speed = 1.03 Mbyte/sec
  Worst block time = 0.97 ms
    33.43% of audio frame time

Reading SDTEST1.WAV & SDTEST2.WAV:
  Overall speed = 0.81 Mbyte/sec
  Worst block time = 2.31 ms
    79.69% of audio frame time

Reading SDTEST1.WAV & SDTEST2.WAV staggered:
  Overall speed = 0.81 Mbyte/sec
  Worst block time = 1.86 ms
    64.01% of audio frame time

Reading SDTEST1.WAV, SDTEST2.WAV, SDTEST3.WAV:
  Overall speed = 0.76 Mbyte/sec
  Worst block time = 3.69 ms
    127.32% of audio frame time

Reading SDTEST1.WAV, SDTEST2.WAV, SDTEST3.WAV staggered:
  Overall speed = 0.76 Mbyte/sec
  Worst block time = 2.66 ms
    91.54% of audio frame time

Reading SDTEST1.WAV, SDTEST2.WAV, SDTEST3.WAV, SDTEST4.WAV:
  Overall speed = 0.77 Mbyte/sec
  Worst block time = 4.90 ms
    168.92% of audio frame time

Reading SDTEST1.WAV, SDTEST2.WAV, SDTEST3.WAV, SDTEST4.WAV staggered:
  Overall speed = 0.77 Mbyte/sec
  Worst block time = 3.29 ms
    113.43% of audio frame time