4ms Company WAV Recorder Manual do utilizador - Página 10

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Hot Swapping the microSD Card

As long as the Busy light is off, it is acceptable to remove the microSD card (and put it into a

computer to check the files, etc) without powering down the WAV Recorder. You can even re-insert a

different card.

When you reinsert the microSD card into the WAV Recorder while the module is powered on, you

must re-mount it (refresh it) by holding the button down for 2 seconds while in Record mode. This will

display an animation which shows how much available space is on the card (see Checking for Free

Space section). After the animation is complete, the card is ready for recording and playback.

If you forget to refresh a newly inserted card and try to start recording or playing immediately, the WAV

Recorder will attempt to re-mount the card before recording or playing. This can cause a delay and

sometimes a "hiccup" in playback or recording.

You do not need to refresh a card if it's already inserted when you power up the WAV Recorder. The

module always mounts the current card as part of its normal boot-up sequence.

The LED Signal Meter shows the output signal level:

bright

dim

Clip

The Signal Meter shows the actual signal present on the output jacks-whether you are recording or

playing. By adjusting the Gain knob while watching the Signal Meter, you can set your level

appropriately and avoid clipping.

The maximum size of any .wav file is about 4GB. Depending on the recording rate, this could mean

anywhere from 2 to 13 hours. The WAV Recorder can continue recording beyond this limit by splitting

ultra-long recording sessions into a series of files. Once a file becomes about 4GB large, the WAV

Recorder will close the file and keep recording into a new file. In this way, you can fill your entire card

with recordings if you leave the module recording without interruption. The Wav Recorder can even

record for days or weeks (depending on the size of you card and the sample rate you select in System

Mode). The included card is 16GB and will record for about 27 hours before stopping at the default

recording rate (44.1kHz, 16-bit, stereo).

We highly recommend using a faster card for any long recording (see Recording Rates section).

-0.4dBFS (20Vpp): The red LEDs turn bright solid (clipping)

-2.6dBFS (16Vpp): The red LEDs turn on dimly

-8dBFS

(8.5Vpp): The white LEDs turn on

-12dBFS (5Vpp): The upper blue LEDs turn on

-21dBFS (1.75Vpp): The lower blue LEDs turn on

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