diff --git a/analyze_fft4096_iqem_F32.h b/analyze_fft4096_iqem_F32.h
index 3f7f2f2..b2b35c9 100644
--- a/analyze_fft4096_iqem_F32.h
+++ b/analyze_fft4096_iqem_F32.h
@@ -1,9 +1,9 @@
/*
* analyze_fft4096_iqem_F32.h Assembled by Bob Larkin 18 Feb 2022
*
- * External Memory **** BETA TEST VERSION - NOT FULLY TESTED **** <<<<<<<<<<
+ * External Memory - INO supplied memory arrays. Windows are half width.
*
- * Note: Teensy 4.x Only, 3.x not supported
+ * Note: Teensy 4.x ONLY, 3.x not supported
*
* Does Fast Fourier Transform of a 4096 point complex (I-Q) input.
* Output is one of three measures of the power in each of the 4096
@@ -73,7 +73,7 @@
* required if power averaging is used and about 58 kBytes without power averaging.
*
* In addition, this requires 64 AudioMemory_F32 which work out to about an
- * additional 33 kBytesof memory.
+ * additional 33 kBytes of memory.
*
* If several FFT sizes are used, one at a time, the memory can be shared. Probably
* the simplest way to do this with a Teensy is to set up C-language unions.
@@ -96,11 +96,6 @@
* If xAxis=2 f=fs/2 on left edge, f=0 in middle
* If xAxis=3 f=fs/2 on right edgr, f=0 in middle
*
- * If there is 180 degree phase shift to I or Q these all get reversed.
- * xAxis=1 is a mathemetically consistent method. It has positive frequencies
- * on the right and negative ones on the left. The center is half the sample
- * rate, both + and -. Uniormly sampled data lives in this circular world.rate.
- *
* Timing, maximum microseconds per update() over the 16 updates,
* and the average percent processor use for 44.1 kHz sample rate and Nave=1:
* T4.0 Windowed, dBFS Out (FFT_DBFS), 710 uSec, Ave 4.64%
@@ -119,7 +114,7 @@
*
* To use an alternate window function, just fill it into the array, window, above.
* It is only half of the window (2048 floats). It looks like a full window
- * function with the righ half missing. It should start with small
+ * function with the right half missing. It should start with small
* values on the left (near[0]) and go to 1.0 at the right ([2048]).
*
* As with all library FFT's this one provides overlapping time series. This
@@ -140,7 +135,7 @@
*
* 22 Feb 2022 Fixed xAxis error, twice!
*/
- /* Info
+ /* Info:
* __MK20DX128__ T_LC; __MKL26Z64__ T3.0; __MK20DX256__T3.1 and T3.2
* __MK64FX512__) T3.5; __MK66FX1M0__ T3.6; __IMXRT1062__ T4.0 and T4.1 */
@@ -298,7 +293,7 @@ private:
int outputType = FFT_RMS; //Same type as I16 version init
int count = 0;
int nAverage = 1;
- uint8_t xAxis = 0x03;
+ uint8_t xAxis = 0x03; // See discussion above
// The Hann window is a good all-around window
// This can be used with zero-bias frequency interpolation.