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comparison pirelli/audio-tones @ 383:97a294f69426

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pirelli/audio-tones: basic keybeep and DTMF captured
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 10 Nov 2021 01:22:36 +0000
parents
children dec73b00871d
comparison
equal deleted inserted replaced
382:4307b57229d3 383:97a294f69426
1 Keybeep in handheld mode:
2
3 KBP_R fn da3b da3b 0004
4
5 The two overlapping da3b tones (697 Hz, -7 dBfs) are exactly the same
6 as in TCS211 reference.
7
8 This 2x da3b keybeep remains the same in an active call, and also when the
9 loudspeaker is enabled. With the loudspeaker on, the beeps are very loud!
10
11 With the headset plugged in, the keybeep changes to:
12
13 KBP_R fn da0b da0b 0004
14
15 This headset mode keybeep still consists of two overlapping 697 Hz tones,
16 but now the amplitude of each single tone is -21 dBfs.
17
18 Keybeep duration is 120 ms in TCS211 reference, but only 80 ms in Pirelli's
19 version.
20
21 Switching to DTMF keypad mode:
22
23 All keys beyond the basic dial set generate the same tone as the # key:
24
25 TON_R fn bd4c 6683 0000 0001 000a 000a 0005 0000 0005 0000 0005 0000 0005
26
27 The above trace was captured in handheld mode. The frequencies are the same
28 as in TCS211 reference (941 Hz low, 1477 Hz high), and the dBfs amplitudes are
29 also unchanged: -7 dBfs for the low tone, -5 dBfs for the high tone.
30
31 With the headset plugged in, the tone changes to:
32
33 TON_R fn bd0f 661a 0000 0001 000a 000a 0005 0000 0005 0000 0005 0000 0005
34
35 The new amplitudes are -21 dBfs for the low tone and -19 dBfs for the high tone.
36
37 The duration of the tone is 100 ms, same as in TCS211 reference.