After reading https://github.com/nu774/qaac/wiki/E...-configuration I think your tvbr values choises are more logical. Sample Rate is a useful option though. Here is my new encoder.txt version (with some cosmetic/explenations improvements in my opinion) :

Code:
[codec]
.m4a
qaac.exe

[msgifnoencoder]
Before using this encoder a seperate component must first be installed from https://sites.google.com/site/qaacpage/ .

[radio&slider]
4
24
292
1
10
0
Quality (tVBR)

8
True Variable Bite Rate: Quality 0 (~40kbps)
-V 0 
True Variable Bite Rate: Quality 9 (~47kbps)
-V 9 
True Variable Bite Rate: Quality 18 (~55kbps)
-V 18 
True Variable Bite Rate: Quality 27 (~65kbps)
-V 27 
True Variable Bite Rate: Quality 36 (~75kbps)
-V 36 
True Variable Bite Rate: Quality 45 (~90kbps)
-V 45 
True Variable Bite Rate: Quality 54 (~105kbps)
-V 54 
True Variable Bite Rate: Quality 63 (~125kbps)
-V 63 
True Variable Bite Rate: Quality 73 (~145kbps)
-V 73 
True Variable Bite Rate: Quality 82 (~165kbps)
-V 82 
True Variable Bite Rate: Quality 91 (~195kbps)
-V 91 
True Variable Bite Rate: Quality 100 (~230kbps)
-V 100 
True Variable Bite Rate: Quality 109 (~265kbps)
-V 109 
True Variable Bite Rate: Quality 118 (~300kbps)
-V 118 
True Variable Bite Rate: Quality 127 (~335kbps)
-V 127
[/sliderend]
80
0
Bit Rate (ABR)

9
Average Bit Rate: 16 Kbps
-a 16 
Average Bit Rate: 24 Kbps
-a 24 
Average Bit Rate: 32 Kbps
-a 32 
Average Bit Rate: 48 Kbps
-a 48 
Average Bit Rate: 56 Kbps
-a 56 
Average Bit Rate: 64 Kbps
-a 64 
Average Bit Rate: 80 Kbps
-a 80 
Average Bit Rate: 96 Kbps
-a 96 
Average Bit Rate: 128 Kbps
-a 128  
Average Bit Rate: 144 Kbps
-a 144  
Average Bit Rate: 160 Kbps
-a 160  
Average Bit Rate: 192 Kbps
-a 192  
Average Bit Rate: 224 Kbps
-a 224  
Average Bit Rate: 256 Kbps
-a 256 
Average Bit Rate: 320 Kbps
-a 320 
Average Bit Rate: Highest Possible
-a 0
[/sliderend]
154
0
Bit Rate (cVBR)

9
Constrained Variable Bit Rate: 16 Kbps
-v 16 
Constrained Variable Bit Rate: 24 Kbps
-v 24 
Constrained Variable Bit Rate: 32 Kbps
-v 32 
Constrained Variable Bit Rate: 48 Kbps
-v 48 
Constrained Variable Bit Rate: 56 Kbps
-v 56 
Constrained Variable Bit Rate: 64 Kbps
-v 64 
Constrained Variable Bit Rate: 80 Kbps
-v 80 
Constrained Variable Bit Rate: 96 Kbps
-v 96 
Constrained Variable Bit Rate: 128 Kbps
-v 128 
Constrained Variable Bit Rate: 144 Kbps
-v 144 
Constrained Variable Bit Rate: 160 Kbps
-v 160 
Constrained Variable Bit Rate: 192 Kbps
-v 192 
Constrained Variable Bit Rate: 224 Kbps
-v 224 
Constrained Variable Bit Rate: 256 Kbps
-v 256 
Constrained Variable Bit Rate: 320 Kbps
-v 320 
Constrained Variable Bit Rate: Highest Possible
-v 0 
[/sliderend]
220
0
Bit Rate (CBR)

9
Constant Bit Rate: 16 Kbps
-c 16 
Constant Bit Rate: 24 Kbps
-c 24 
Constant Bit Rate: 32 Kbps
-c 32 
Constant Bit Rate: 48 Kbps
-c 48 
Constant Bit Rate: 56 Kbps
-c 56 
Constant Bit Rate: 64 Kbps
-c 64 
Constant Bit Rate: 80 Kbps
-c 80 
Constant Bit Rate: 96 Kbps
-c 96 
Constant Bit Rate: 128 Kbps
-c 128 
Constant Bit Rate: 144 Kbps
-c 144 
Constant Bit Rate: 160 Kbps
-c 160 
Constant Bit Rate: 192 Kbps
-c 192 
Constant Bit Rate: 224 Kbps
-c 224 
Constant Bit Rate: 256 Kbps
-c 256 
Constant Bit Rate: 320 Kbps
-c 320 
Constant Bit Rate: Highest Possible
-c 0 
[/sliderend]


[label]
10
44
low quality (smaller file)
808080


[label]
216
44
high quality (larger file)
808080


[combo]
60
66
110
1
LC AAC
 
HE AAC (< 84 kbps) (not tVBR)
--he 


[combo]
180
66
110
1
Keep sampling rate

Auto (lower on low bitrate)
-r auto 
44.1kHz sampling rate
-r 44100 
48.0kHz sampling rate
-r 48000 

 
[clistring]
-o "[outfile]" --no-optimize -q2 -


[minfreq]
8000


[maxfreq]
96000


[maxchannels]
6
Of course still no working in 64 bits...