Lisa Compact
37
8
Fallback to card
An important card-related feature of the Lisa is the fallback in case of network or streaming failure.
When you use the Lisa to play audio from the internet, you rely on a stable internet connection. A
problem with the stream provider, the Internet Service Provider (ISP), a problem in the IP network
(failure of modem/switch etc.), all of these can cause problems with the audio playback from internet.
'Fallback to card' makes the Lisa switch automatically and start playing from the card if there are
problems with the network connection or with the stream that is being played. More specifically, when
the Lisa receives no audio stream data, it will fade out, switch to the card and start playing tracks from
the card.
While playing form the card in fallback, the Lisa continually checks if the stream is available again. If
so, the track that is currently played will be finished, fading the audio out towards the end of the track.
Then the Lisa switches back to the stream (which it has been buffering in the mean time) and fade back
in to the stream audio.
It may take some time before the Lisa switches back to the stream when the internet connection is
restored, because the Lisa finishes the track it is playing before returning to the stream
See also
Verify if the Lisa plays from the SD card in fallback mode
to learn how this scenario can be
recognized.
For more information about the audio buffer size and the time that the Lisa can keep playing in case of
a network issue, see
Note that for proper operation of the fallback to card, the preset URL must point directly to an audio
stream. If the preset URL actually points to a playlist that contains several audio stream URLs, the Lisa
will try the next URL in the playlist in case of problems with the stream. However, if the internet
connection itself is failing, this will not help.
For a detailed description of the flow that the Lisa follows in case of network or streaming failure, the
selection of tracks that are played during fallback and in which order these are played, see
8.1
Fallback in case of stream failure
When the playback of audio from the internet fails, the Lisa will fallback to the card (see
for more information on this feature). This section details which tracks are selected (or rather:
which playlist) and the order in which the tracks are played.
Consider you have a Lisa device with preset 1 being a Pop station while preset 2 being a Lounge
station. Should the device fallback to card, you would normally want that the same genre of music starts
playing from card. The Lisa does not have genre information, so this is arranged differently. For fallback
to card, there is a coupling between the list of stations and fallback playlists. It allows you to couple a
matching fallback playlist to each station. It works as follows:
·
Playlist one (1.pls) is the fallback playlist for preset 1.
·
Playlist two (2.pls) is the fallback playlist for preset 2 and so on.
