[BUG] bitRate and sampleRate cannot be set on Android

Flutter Sound Version :

• Released or Beta version ? Released

• Version number ? flutter_sound: ^6.4.2+1

• FULL or LITE flavor ? FULL

• Result of the command “flutter pub deps | grep flutter_sound” (very important) |-- flutter_sound 6.4.2+1 | |-- flutter_sound_platform_interface 6.4.2+1 | |-- flutter_sound_web 6.4.2+1 | | |-- flutter_sound_platform_interface…

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Severity

• Result is not what expected ? The bitRate and sampleRate parameter in startRecorder is not giving correct result. I set bitRate: 48000 and sampleRate: 44100, but the output audio is bitRate: 12800 and sampleRate: 8000

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Platforms you faced the error

• Android 9

• Real device ? Samsung S8

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Logs

(This is very important. Most of the time we cannot do anything if we do not have information on your bug)

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Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior: await _flutterSoundRecorder.openAudioSession(); await _flutterSoundRecorder.setSubscriptionDuration(Duration(milliseconds: 500)); await _flutterSoundRecorder.startRecorder( toFile: file.path, bitRate: 48000, sampleRate: 44100, );

Use ffprobe to check the bitrate: ffprobe -v error -show_format -show_streams R_1604830207119.aac Outputs

[STREAM]
index=0
codec_name=amr_nb
codec_long_name=AMR-NB (Adaptive Multi-Rate NarrowBand)
profile=unknown
codec_type=audio
codec_time_base=1/8000
codec_tag_string=samr
codec_tag=0x726d6173
sample_fmt=flt
sample_rate=8000
channels=1
channel_layout=mono
bits_per_sample=0
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/8000
start_pts=0
start_time=0.000000
duration_ts=41120
duration=5.140000
bit_rate=12800
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=257
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
TAG:creation_time=2020-11-08T10:10:13.000000Z
TAG:language=eng
TAG:handler_name=SoundHandle
[/STREAM]
[FORMAT]
filename=R_1604830207119.aac
nb_streams=1
nb_programs=0
format_name=mov,mp4,m4a,3gp,3g2,mj2
format_long_name=QuickTime / MOV
start_time=0.000000
duration=5.140000
size=8962
bit_rate=13948
probe_score=100
TAG:major_brand=3gp4
TAG:minor_version=0
TAG:compatible_brands=isom3gp4
TAG:creation_time=2020-11-08T10:10:13.000000Z
TAG:com.android.version=9
[/FORMAT]

Expected behavior A clear and concise description of what you expected to happen.

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Additional context**

Add any other context about the problem here.

[tonypottera24]

Hi Larpoux,

I didn’t set anything in startRecorder, just use the default codec.

Thanks again for your contribution to this project.

[Larpoux]

You can try :

myRecorder.StartRecorder( ... , sampleRate: 8000, ...);

If not better maybe it is a problem related with mono/stereo.