annotate aux/loudnesstest.m @ 6:ed0a8621b96a
prepare2listen small fixes, manual, standard target loudness (-23 dBLUFS)
| author |
Brecht De Man <b.deman@qmul.ac.uk> |
| date |
Mon, 24 Nov 2014 16:55:55 +0000 |
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85bff3d1b6fe |
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0014c50188da |
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line source |
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1 % test loudness mod
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2
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3 tic;
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4
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5 % target loudness and test file
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6 target_loudness = -18; % dBLU
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7 filename = 'pro.wav';
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8
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9 % import sound file
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10 [audio, fs] = audioread(filename);
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11
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12 % measure and display loudness
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13 initial_loudness = getloudness(audio, fs, 'ITU', 0);
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14 disp(['Initial loudness: ' num2str(initial_loudness)]);
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15
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16 % apply gain
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17 difference_loudness = target_loudness - initial_loudness;
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18 disp(['Difference in loudness: ' num2str(difference_loudness)]);
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19 audio = 10^(difference_loudness/20) .* audio;
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20 disp(['Gain: ' num2str(10^(difference_loudness/20))]);
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21
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22 % measure and display loudness (should be equal to target loudness)
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23 resulting_loudness = getloudness(audio, fs, 'ITU', 0);
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24 disp(['Resulting loudness: ' num2str(resulting_loudness)]);
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25
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26 elapsed_time = toc;
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27 disp(['Elapsed time: ' num2str(elapsed_time)]); |
