Mysterious: Elif and Counter Increment Bug - bash

Question

Hi I am trying to run a for loop with an increment counter that switches into an elif statement. The for loop is a way of building a string of syllables to synthesize with macintalk. I would like to add a short silence every 20ms but I cant seem to get it to work, I've tried a bunch of debugging steps but none seem to work. Can anyone spot the bug that prevents the elif from being accessed?
EDIT
Ok so I followed the suggestion below and used -eq instead = but I noticed that the counter only resets once and does not access the conditional statement a second time. The revised code is posted below:
counter=0;
for k in $indx
do
counter=$(($counter + 1));
echo 'increment counter'
echo $counter
if [ $k -eq 0 ]
then
stream=$stream'#_'${syllarray[k]}
elif [ $counter -eq 20 ]
then
echo Adding Silence after syllable: ${syllarray[k]}
stream=$stream'_'${syllarray[k]}'[[ slnc 20 ]]'
counter=0;
echo 'reset counter'
echo $counter
else
stream=$stream'_'${syllarray[k]}
fi
done
Sample output:
Synthesize A Syllable Stream with Predetermined Lexicon, Word Order and Phonology
Parameters:
Voice -- Victoria
Rate (words/min) -- 120
Pitch Modulation Interval -- 0
Baseline pitch -- 55
Directory Exists :)
Opening Syllable Transcription for Victoria
0
bIY
1
bUW
2
dAE
3
dOW
4
gOW
5
kUW
6
lAE
7
pAE
8
pIY
9
rOW
10
tIY
11
tUW
Counter Balanced Stimulus Order (Indexed by Syllables in Alphabetical Order)
11 2 9 8 4 6 0 5 10 11 2 9 8 4 6 1 3 7 8 4 6 0 5 10 11 2 9 1 3 7 0 5 10 8 4 6 1 3 7 0 5 10 8 4 6 11 2 9 0 5 10 1 3 7 8 4 6 11 2 9 1 3 7 11 2 9 0 5 10 1 3 7 8 4 6 0 5 10 11 2 9 8 4 6 1 3 7 0 5 10 8 4 6 11 2 9 0 5 10 8 4 6 11 2 9 0 5 10 1 3 7 8 4 6 1 3 7 0 5 10 11 2 9 1 3 7 8 4 6 0 5 10 1 3 7 11 2 9 1 3 7 11 2 9 1 3 7 0 5 10 8 4 6 1 3 7 0 5 10 11 2 9 0 5 10 11 2 9 8 4 6 11 2 9 1 3 7 8 4 6 0 5 10 1 3 7 11 2 9 8 4 6 0 5 10 8 4 6 1 3 7 11 2 9 0 5 10 1 3 7 8 4 6 11 2 9 8 4 6 1 3 7 11 2 9 0 5 10 8 4 6 11 2 9 0 5 10 8 4 6 11 2 9 1 3 7 0 5 10 1 3 7 8 4 6 0 5 10 1 3 7 0 5 10 11 2 9 1 3 7 11 2 9 8 4 6 0 5 10 11 2 9 8 4 6 1 3 7
Creating counterbalanced stimulus stream string with proper Macintalk formatting
increment counter
1
increment counter
2
increment counter
3
increment counter
4
increment counter
5
increment counter
6
increment counter
7
increment counter
8
increment counter
9
increment counter
10
increment counter
11
increment counter
12
increment counter
13
increment counter
14
increment counter
15
increment counter
16
increment counter
17
increment counter
18
increment counter
19
increment counter
20
Adding Silence after syllable: gOW
reset counter
0
increment counter
1
..
[truncated for clarity]
..
increment counter
268
Printing Stream to Screen
_tUW_dAE_rOW_pIY_gOW_lAE#_bIY_kUW_tIY_tUW_dAE_rOW_pIY_gOW_lAE_bUW_dOW_pAE_pIY_gOW[[ slnc 20 ]]_lAE#_bIY_kUW_tIY_tUW_dAE_rOW_bUW_dOW_pAE#_bIY_kUW_tIY_pIY_gOW_lAE_bUW_dOW_pAE#_bIY_kUW_tIY_pIY_gOW_lAE_tUW_dAE_rOW#_bIY_kUW_tIY_bUW_dOW_pAE_pIY_gOW_lAE_tUW_dAE_rOW_bUW_dOW_pAE_tUW_dAE_rOW#_bIY_kUW_tIY_bUW_dOW_pAE_pIY_gOW_lAE#_bIY_kUW_tIY_tUW_dAE_rOW_pIY_gOW_lAE_bUW_dOW_pAE#_bIY_kUW_tIY_pIY_gOW_lAE_tUW_dAE_rOW#_bIY_kUW_tIY_pIY_gOW_lAE_tUW_dAE_rOW#_bIY_kUW_tIY_bUW_dOW_pAE_pIY_gOW_lAE_bUW_dOW_pAE#_bIY_kUW_tIY_tUW_dAE_rOW_bUW_dOW_pAE_pIY_gOW_lAE#_bIY_kUW_tIY_bUW_dOW_pAE_tUW_dAE_rOW_bUW_dOW_pAE_tUW_dAE_rOW_bUW_dOW_pAE#_bIY_kUW_tIY_pIY_gOW_lAE_bUW_dOW_pAE#_bIY_kUW_tIY_tUW_dAE_rOW#_bIY_kUW_tIY_tUW_dAE_rOW_pIY_gOW_lAE_tUW_dAE_rOW_bUW_dOW_pAE_pIY_gOW_lAE#_bIY_kUW_tIY_bUW_dOW_pAE_tUW_dAE_rOW_pIY_gOW_lAE#_bIY_kUW_tIY_pIY_gOW_lAE_bUW_dOW_pAE_tUW_dAE_rOW#_bIY_kUW_tIY_bUW_dOW_pAE_pIY_gOW_lAE_tUW_dAE_rOW_pIY_gOW_lAE_bUW_dOW_pAE_tUW_dAE_rOW#_bIY_kUW_tIY_pIY_gOW_lAE_tUW_dAE_rOW#_bIY_kUW_tIY_pIY_gOW_lAE_tUW_dAE_rOW_bUW_dOW_pAE#_bIY_kUW_tIY_bUW_dOW_pAE_pIY_gOW_lAE#_bIY_kUW_tIY_bUW_dOW_pAE#_bIY_kUW_tIY_tUW_dAE_rOW_bUW_dOW_pAE_tUW_dAE_rOW_pIY_gOW_lAE#_bIY_kUW_tIY_tUW_dAE_rOW_pIY_gOW_lAE_bUW_dOW_pAE
Saving Synthesized Stream
Writing to: ./synthesis/stream-Victoria/stream.flac