High-resolution audio recording in wav format based on the Presense Arduino Library sample code

What do you want to do

"Connect the 8ch digital microphone to the Sony Spresense and
　Audio library records high-resolution band (at least 20 kHz) sound with 192 kHz sampling and
　Save to SD Card as a wav format file

As a step 1 to achieve the above, the following are successful.

"Connect one analog microphone to the Sony Spresense and
　Record audible sound (below 20 kHz) with 48 kHz sampling and
　Save to SD Card as mp3 Format File

As per the instructions in the Spresense Arduino Library development guide, we install the DSP Codec binary, obtain a sketch sample, and only change the location where the DSP files are installed.
Here are the sketch samples I got.
https://github.com/sonydevworld/spresense-arduino-compatible/tree/master/Arduino15/packages/SPRESENSE/hardware/spresense/1.0.0/libraries/Audio/examples/application/recorder

The next step 2 will not work for what you want to achieve.

"Connect one analog microphone to the Sony Spresense and
　Record audible sound (below 20 kHz) with 48 kHz sampling and
　Save to SD Card as a wav format file

Recording ends without an error code and the wav file is created, but it cannot be played.
Below is the error message when playing in Windows Media Player.

US>"The file cannot be played.The player does not support the file type or
It may not support the codec used to compress the file."

The code here is
from the above sketch sample. Changing codec type settings for playback content.
The changed code line is as follows:

theAudio->setRecorderMode(AS_SETRECDR_STS_INPUTDEVICE_MIC_A);
theAudio->initRecorder(AS_CODECTYPE_PCM, "/mnt/spif/BIN", AS_SAMPLINGRATE_48000, AS_CHANNEL_MONO);
puts("Init Recorder!");
myFile=theSD.open("test.wav", FILE_WRITE);

Question

• Changes in sketch samples to record wav
• Audio library to adjust digital microphone input gain
• Also, I am a little concerned about the following:Is there a way to deal with it?
  　Each time a code is written to a Spresense, the message area of the Arduino IDE is
  　appears, but the following warning lines are displayed in the text area at any time.
  　'Invalid version found: v1.0.2'