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Merge change 23542 into eclair

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* changes:
  Modify the gain after filtering to prevent TTS clipping in en-US.
This commit is contained in:
Android (Google) Code Review
2009-09-01 16:19:14 -07:00
parent 65d62c774e 3218471bcd
commit b1461fb482
1 changed files with 1 additions and 1 deletions
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packages/TtsService/jni/android_tts_SynthProxy.cpp
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@@ -41,7 +41,7 @@
#define FILTER_LOWSHELF_ATTENUATION -18.0f // in dB #define FILTER_LOWSHELF_ATTENUATION -18.0f // in dB
#define FILTER_TRANSITION_FREQ 1100.0f // in Hz #define FILTER_TRANSITION_FREQ 1100.0f // in Hz
#define FILTER_SHELF_SLOPE 1.0f // Q #define FILTER_SHELF_SLOPE 1.0f // Q
#define FILTER_GAIN 6.0f // linear gain #define FILTER_GAIN 5.5f // linear gain
// such a huge gain is justified by how much energy in the low frequencies is "wasted" at the output // such a huge gain is justified by how much energy in the low frequencies is "wasted" at the output
// of the synthesis. The low shelving filter removes it, leaving room for amplification. // of the synthesis. The low shelving filter removes it, leaving room for amplification.