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Squeak analysis

Source: https://www.youtube.com/watch?v=TspuiaFX2YQ — 23 events (peak > -32 dBFS, longer than 0.4 s).

Reference audio is not included. Its provenance is unclear, so this page shows only analysis of it (spectrograms, pitch tracks, measurements). Each event links to its moment in the source. Every player on this page plays our own resynthesis, rebuilt from the measured pitch contour, slip-pulse timing and average spectral envelope.

Categories

• stepped squeak Several steady pitch plateaus with abrupt jumps between them (mode hopping) — #1, #2, #5, #11, #22
• gliding squeak Mostly one continuous pitched glide, few or no jumps — #4, #21
• squeak → creak Pitched squeak that breaks up into irregular stick-slip pulses — #0, #3, #6, #8, #13, #14, #16, #18, #20
• creak / ratchet Mostly aperiodic: separate slip pulses, heard as a creak or ratchet — #7, #9, #12, #15, #17, #19
• low groan Pitched but low (under ~600 Hz), often wobbly — #10

How they differ

Features

squeak_pct = share of loud frames that are periodic. harmonic_count = spectral centroid / median pitch (higher = brighter). wobble_st = pitch jitter within segments. glide = pitch change within a segment (positive = rising).

#0 at 0.96 s squeak → creak

reference: listen in the source at 1 s   resynthesis

22 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.349	creak			0.737	-46.0
0.349	0.195	squeak	1541.3	1635.2	0.009	-30.0
0.544	0.175	squeak	1363.5	1060.5	0.144	-22.6
0.718	0.105	squeak	408.6	665.9	0.116	-22.5
0.823	0.06	creak			0.425	-24.3
0.883	1.152	creak	446.6	444.4	0.603	-32.4
2.035	0.135	squeak	362.3	380.3	0.063	-44.4
2.17	0.04	creak			0.475	-46.6
2.21	0.125	squeak	301.5	328.4	0.116	-48.6
2.335	0.06	squeak	409.1	436.1	0.226	-47.3
2.395	0.085	creak			0.288	-47.1
2.479	0.294	squeak	759.5	1134.6	0.06	-27.7
2.774	0.055	squeak	560.4	538.3	0.127	-22.5
2.829	0.095	squeak	162.2	946.5	0.119	-24.7
2.923	0.145	squeak	236.2	635.9	0.072	-23.1
3.068	0.05	creak			0.394	-25.1
3.118	0.055	squeak	449.7	427.1	0.214	-23.6
3.173	0.05	creak			0.325	-25.4
3.223	0.524	squeak	377.2	317.8	0.055	-27.9
3.746	0.584	squeak	288.4	289.2	0.067	-34.4
4.33	0.045	creak			0.289	-36.1
4.375	0.15	squeak	331.5	380.7	0.131	-44.8

#1 at 9.35 s stepped squeak

reference: listen in the source at 9 s   resynthesis

7 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.264	squeak	1511.1	1632.7	0.003	-28.9
0.264	0.334	squeak	1413.7	1050.8	0.09	-23.4
0.599	0.065	squeak	1919.5	936.1	0.065	-24.8
0.663	0.354	squeak	310.2	551.3	0.035	-27.3
1.018	0.254	squeak	469.3	474.5	0.023	-29.7
1.272	0.18	squeak	602.6	679.8	0.067	-39.0
1.452	0.135	creak			0.909	-56.3

#2 at 13.62 s stepped squeak

reference: listen in the source at 14 s   resynthesis

4 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.22	squeak	1510.6	1667.9	0.007	-31.3
0.22	0.394	squeak	1431.2	1347.5	0.024	-28.1
0.614	0.444	squeak	1130.4	1412.4	0.059	-29.2
1.058	0.02	squeak	466.1	465.9	0.205	-56.8

#3 at 16.26 s squeak → creak

reference: listen in the source at 16 s   resynthesis

7 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.324	creak			1.903	-40.2
0.324	0.06	squeak	1005.9	1409.4	0.102	-25.8
0.384	0.125	squeak	484.6	774.2	0.101	-29.2
0.509	0.055	squeak	962.5	1154.8	0.152	-40.1
0.564	0.11	squeak	1439.8	1147.1	0.113	-41.6
0.673	0.05	squeak	817.2	817.0	0.182	-53.9
0.723	0.015	squeak			0.215	-59.5

#4 at 18.25 s gliding squeak

reference: listen in the source at 18 s   resynthesis

8 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.678	squeak	955.3	479.3	0.095	-34.9
0.678	0.045	creak			0.328	-38.8
0.723	0.125	squeak	429.3	411.1	0.182	-37.7
0.848	0.04	squeak	137.3	136.7	0.232	-39.2
0.888	0.21	creak			0.331	-41.7
1.098	0.125	squeak	126.2	130.4	0.214	-43.3
1.222	0.788	squeak	644.3	453.2	0.026	-44.6
2.01	0.155	creak			0.594	-46.1

#5 at 23.22 s stepped squeak

reference: listen in the source at 23 s   resynthesis

8 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.065	squeak	1534.2	1443.0	0.054	-44.4
0.065	0.294	creak			1.6	-43.4
0.359	0.055	creak	1492.3	1490.5	0.296	-48.9
0.414	0.234	squeak	1549.5	1767.8	0.006	-36.0
0.649	0.055	squeak	590.5	2304.4	0.048	-25.9
0.703	0.434	squeak	1134.5	1354.8	0.022	-26.2
1.137	0.404	squeak	448.3	1423.6	0.03	-30.1
1.541	0.025	squeak	712.5	712.5	0.2	-56.5

#6 at 25.76 s squeak → creak

reference: listen in the source at 26 s   resynthesis

6 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.055	creak			1.523	-53.6
0.055	0.125	squeak	1029.3	1105.6	0.008	-42.6
0.18	0.045	squeak	2232.8	1132.1	0.072	-44.1
0.224	0.489	squeak	611.5	456.5	0.137	-36.0
0.713	0.07	squeak	408.1	383.0	0.214	-32.8
0.783	0.773	creak			0.659	-34.3

#7 at 30.32 s creak / ratchet

reference: listen in the source at 30 s   resynthesis

5 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	1.437	creak			0.809	-37.5
1.437	0.21	squeak	217.0	292.3	0.152	-34.1
1.646	0.095	creak			0.28	-35.2
1.741	0.1	squeak	484.3	665.7	0.218	-37.3
1.841	0.075	creak			0.303	-49.0

#8 at 34.44 s squeak → creak

reference: listen in the source at 34 s   resynthesis

3 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.1	creak			0.303	-53.7
0.1	0.594	squeak	1599.4	595.9	0.038	-34.2
0.693	0.394	creak			0.582	-36.3

#9 at 37.54 s creak / ratchet

reference: listen in the source at 38 s   resynthesis

6 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.619	creak			1.537	-42.7
0.619	0.17	squeak	248.5	224.2	0.091	-35.9
0.788	0.095	creak			0.29	-36.3
0.883	0.2	squeak	175.3	149.6	0.136	-34.5
1.083	0.065	squeak	138.7	137.5	0.216	-35.8
1.147	0.978	creak			0.779	-42.0

#10 at 41.98 s low groan

reference: listen in the source at 42 s   resynthesis

2 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.459	squeak	318.9	660.4	0.101	-29.8
0.459	0.095	creak			0.392	-48.5

#11 at 42.71 s stepped squeak

reference: listen in the source at 43 s   resynthesis

12 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.14	creak			1.103	-57.4
0.14	0.12	squeak	1525.0	1578.5	0.041	-53.8
0.259	0.11	squeak	1611.8	1581.8	0.081	-38.6
0.369	0.04	squeak	776.7	759.7	0.178	-32.5
0.409	0.105	squeak	174.4	172.9	0.154	-31.2
0.514	0.055	squeak	227.9	226.9	0.139	-32.7
0.569	0.08	squeak	134.2	327.0	0.196	-32.4
0.649	0.239	squeak	652.5	719.1	0.04	-33.5
0.888	0.06	squeak	789.7	793.4	0.215	-35.3
0.948	0.075	squeak	1370.3	999.9	0.175	-37.3
1.023	0.115	squeak	1372.2	1405.7	0.138	-41.6
1.137	0.01	creak			0.315	-57.8

#12 at 46.41 s creak / ratchet

reference: listen in the source at 46 s   resynthesis

2 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.289	squeak	1054.9	627.4	0.083	-34.2
0.289	2.275	creak			0.683	-30.8

#13 at 50.27 s squeak → creak

reference: listen in the source at 50 s   resynthesis

5 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.115	creak			0.697	-30.9
0.115	0.07	squeak	338.1	364.4	0.15	-29.8
0.185	0.259	squeak	309.5	540.6	0.145	-28.8
0.444	0.379	squeak	648.7	590.3	0.042	-36.6
0.823	0.224	creak			0.681	-42.3

#14 at 52.48 s squeak → creak

reference: listen in the source at 52 s   resynthesis

2 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.269	squeak	1705.1	848.6	0.04	-33.0
0.269	0.284	creak			0.58	-35.1

#15 at 54.21 s creak / ratchet

reference: listen in the source at 54 s   resynthesis

2 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.175	creak			0.394	-36.4
0.175	0.439	creak	512.4	512.4	0.519	-36.0

#16 at 55.68 s squeak → creak

reference: listen in the source at 56 s   resynthesis

7 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.045	creak			1.0	-51.3
0.045	0.04	squeak	329.1	341.1	0.14	-27.4
0.085	0.274	squeak	419.1	544.4	0.099	-28.2
0.359	0.17	creak			0.431	-40.1
0.529	0.11	squeak	1093.1	1215.7	0.079	-46.8
0.639	0.384	squeak	612.4	1591.9	0.019	-40.2
1.023	0.544	creak	788.6	787.8	0.746	-38.4

#17 at 58.32 s creak / ratchet

reference: listen in the source at 58 s   resynthesis

6 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.13	creak			0.503	-33.5
0.13	0.16	squeak	649.2	628.1	0.057	-30.4
0.289	0.075	squeak	447.7	444.2	0.127	-28.0
0.364	0.125	creak			0.473	-30.4
0.489	0.04	squeak	277.9	279.8	0.235	-30.5
0.529	0.818	creak			0.658	-35.4

#18 at 62.17 s squeak → creak

reference: listen in the source at 62 s   resynthesis

12 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.883	creak			0.816	-43.8
0.883	0.07	creak	126.7	126.7	0.298	-44.0
0.953	0.409	creak	120.2	123.9	0.755	-45.4
1.362	0.075	squeak	1734.6	1869.3	0.019	-41.7
1.437	0.09	squeak	2349.0	2261.9	0.009	-27.5
1.527	0.274	squeak	467.2	1341.7	0.022	-27.5
1.801	0.07	squeak	1064.0	985.4	0.103	-27.0
1.871	0.04	squeak	1926.5	1908.7	0.137	-28.8
1.911	0.294	squeak	950.1	716.9	0.012	-28.5
2.205	0.08	squeak	237.6	710.8	0.099	-51.1
2.285	0.04	squeak	708.5	709.6	0.112	-52.8
2.325	0.359	creak			1.163	-53.1

#19 at 65.43 s creak / ratchet

reference: listen in the source at 65 s   resynthesis

3 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.389	creak			1.222	-41.2
0.389	0.504	creak	1179.4	1111.5	0.628	-49.2
0.893	0.015	creak			0.252	-55.4

#20 at 66.54 s squeak → creak

reference: listen in the source at 67 s   resynthesis

5 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.389	squeak	1356.3	1333.1	0.025	-29.7
0.389	0.075	squeak	666.3	963.8	0.042	-26.9
0.464	0.08	squeak	1905.9	890.5	0.165	-27.7
0.544	0.205	squeak	404.4	622.3	0.047	-27.8
0.748	0.549	creak			0.683	-33.7

#21 at 72.39 s gliding squeak

reference: listen in the source at 72 s   resynthesis

6 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.21	creak			1.214	-41.0
0.21	0.195	squeak	1481.0	1648.6	0.012	-42.1
0.404	0.085	creak			0.458	-41.0
0.489	0.085	squeak	2470.0	2282.4	0.015	-28.9
0.574	0.244	squeak	466.0	1340.3	0.027	-27.8
0.818	0.449	squeak	134.1	1399.8	0.018	-30.2

#22 at 76.32 s stepped squeak

reference: listen in the source at 76 s   resynthesis

6 segments

start s	dur s	type	f0 start	f0 end	roughness	level dB
0.0	0.289	squeak	400.3	397.1	0.068	-41.2
0.289	0.16	creak			0.529	-48.6
0.449	0.13	squeak	1545.7	1868.3	0.019	-38.4
0.579	0.045	squeak	1050.6	2204.7	0.076	-41.9
0.624	0.13	squeak	2495.3	2246.3	0.022	-26.3
0.753	0.703	squeak	1414.9	1415.6	0.009	-28.6