This is BibTeX, Version 0.99d (TeX Live 2017/Debian)
Capacity: max_strings=100000, hash_size=100000, hash_prime=85009
The top-level auxiliary file: main.aux
The style file: plain.bst
Database file #1: cites.bib
I was expecting a `,' or a `}'---line 22 of file cites.bib
 : 
 : )
(Error may have been on previous line)
I'm skipping whatever remains of this entry
I was expecting a `,' or a `}'---line 25 of file cites.bib
 : 
 : title = "ROBUST SPEECH / MUSIC CLASSIFICATION IN AUDIO DOCUMENTS"
(Error may have been on previous line)
I'm skipping whatever remains of this entry
I was expecting a `,' or a `}'---line 32 of file cites.bib
 : 
 : title = "METHODS FOR SPEECH / MUSIC DETECTION AND CLASSIFICATION"
(Error may have been on previous line)
I'm skipping whatever remains of this entry
I was expecting a `,' or a `}'---line 39 of file cites.bib
 : 
 : title = "Speech/Music Discrimination using Hybrid-Based Feature Extraction for Audio Data Indexing"
(Error may have been on previous line)
I'm skipping whatever remains of this entry
Warning--to sort, need author or key in robust
Warning--to sort, need author or key in mirex
Warning--to sort, need author or key in hybrid
Warning--empty author in robust
Warning--empty title in robust
Warning--empty journal in robust
Warning--empty year in robust
Warning--empty author in mirex
Warning--empty title in mirex
Warning--empty journal in mirex
Warning--empty year in mirex
Warning--empty author in hybrid
Warning--empty title in hybrid
Warning--empty journal in hybrid
Warning--empty year in hybrid
You've used 5 entries,
            2118 wiz_defined-function locations,
            509 strings with 4398 characters,
and the built_in function-call counts, 965 in all, are:
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call.type$ -- 5
change.case$ -- 16
chr.to.int$ -- 0
cite$ -- 20
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format.name$ -- 8
if$ -- 187
int.to.chr$ -- 0
int.to.str$ -- 5
missing$ -- 5
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num.names$ -- 4
pop$ -- 40
preamble$ -- 1
purify$ -- 14
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skip$ -- 37
stack$ -- 0
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swap$ -- 2
text.length$ -- 0
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top$ -- 0
type$ -- 20
warning$ -- 15
while$ -- 4
width$ -- 6
write$ -- 34
(There were 4 error messages)