package libqt5multimediaquick-p5-touch (not installed) failed to install/upgrade: subprocess new pre-installation script returned error exit status 2

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just trying to install qsynth4.0

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libqt5multimediaquick-p5-touch (not installed)
ProcVersionSignature: Ubuntu 3.19.0-30.33~14.04.1-generic 3.19.8-ckt6
Uname: Linux 3.19.0-30-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.15
Architecture: amd64
Date: Thu Oct 1 16:55:01 2015
DuplicateSignature: package:libqt5multimediaquick-p5-touch:(not installed):subprocess new pre-installation script returned error exit status 2
ErrorMessage: subprocess new pre-installation script returned error exit status 2
InstallationDate: Installed on 2015-09-26 (5 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.4
 apt 1.0.1ubuntu2.10
SourcePackage: qtmultimedia-opensource-src-touch
Title: package libqt5multimediaquick-p5-touch (not installed) failed to install/upgrade: subprocess new pre-installation script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)