Index: org/audio.html =================================================================== --- org/audio.html (revision 6cb85c27f904f32e3ec427f40f7bb081a23c6b30) +++ org/audio.html (revision 6cb85c27f904f32e3ec427f40f7bb081a23c6b30) @@ -0,0 +1,183 @@ + + + + +Audio + + + + + + + +
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Audio

Enrico Schwass

Created: 2022-05-03 Tue 13:09

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1. Description Audio sample file AudioAufzeichnungLOW.bin

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+Little Endian!!! +

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1.1. Global Frame Header (6 x 32 Bit) Offset 0x00000000

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1.1.1. 32 Bit Magic word 0x726574fb = 0xfb746572 next magic bytes found at offsets

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+0x0000 (0000) +0x0544 (1348) +0x0a88 (2696) +0x0fcf (4047) +0x1510 (5392) +0x1a57 (6743) +0x1f9b (8091) +0x24df (9439) +

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1.1.2. 32 Bit Frame length in 32 bit words

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+0x51010000 = 0x00000151 = Integer 337 * 4 bytes = 1348 Bytes = 0x0544 +

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1.1.3. 32 Bit Running Frame number

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+0x23450000 = 0x00004523 = Integer 17699 +

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1.1.4. 32 Bit Frame Type

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+0x00010000 = 0x00000100 = Integer 256 +

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1.1.5. 32 Bit Data header length in 32 bit words

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+0x0b000000 = 0x0000000b = Integer 11 * 4 = 44 Bytes +

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1.1.6. 32 Bit Reserved

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+0x00000000 = 0x00000000 = Integer 0 +

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1.2. Ammos Data header 44 bytes

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+4 Bytes Sample rate +4 Bytes Status +8 Bytes Frequency +4 Bytes Demod Bandwidth +4 Bytes Demod Type +4 Bytes Sample Count +4 Bytes Channel Count +4 Bytes Sample Size +

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+8 Bytes timestamp if extended +

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+0xd4300000 = 0x000030d4 = 12500 Sample rate +0x00000000 = 0x00000000 = 0 Squelch Status +0xc0d3f205 0x00000000 = 0x00000000 0x05f2d3c0 = 99800000 = 99.8 MHz +0xc0d40100 = 0x0001d4c0 = 120000 = 120 KHz +0x00000000 = 0x00000000 = 0 = FM +0x80020000 = 0x00000280 = Integer 640 = Sample Count per Channel +0x01000000 = 0x00000001 = 1 = 1 Channel +0x02000000 = 0x00000002 = 2 = 2 Bytes Sample size +0x1d26fe89 0xcada0500 = 0x0005daca 0x89fe261d = 1647938316938525 microseconds Unixtime = 2022-03-22T09:38:36 +

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1.3. Ammos Audio Data Body

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+Offset 0x0044 = Integer 68 - Next offset 1348 - Differenz = 1280 +

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