Broken records get a second spin
A pilot project recycles vinyl records into new pressings while maintaining commercial audio quality.
Obsolete vinyl records are recycled into new pressings while maintaining commercial audio quality
© GZ MediaThe initiative was led by Warner Music Group, GZ Media and Abbey Road Studios, UK.
Although unsold inventory and obsolete records represent a potentially valuable material stream, this has previously been difficult to reintegrate into production due to variability in composition, manufacturing origin and processing history.
The PVC used to make these records is also a source of emissions in vinyl manufacturing, making material recovery an attractive option.
The project, Giving Vinyl a Second Life Without Compromising Sound, seeks to give these records a new lease of life.
The feedstock used in the pilot consisted of around 10,000 obsolete records from Warner Music Group’s warehouse inventory in Europe. The material was intentionally selected to represent a realistic industry scenario, with records originating from multiple artists, titles, pressing plants, production runs and compound sources.
The records underwent visual inspection, audio screening and thermal stability testing before suitable material was selected for recycling. As vinyl compound formulations vary between manufacturers and over time, the material stream was expected to contain different pigments, additives, stabiliser systems and processing aids.
'Rather than creating a homogeneous feedstock, the pilot’s objective was to evaluate how a realistic mixed-origin material stream would behave during manufacturing,' explains Vladimír Víšek, Head of Sustainability at GZ Media.
The selected records were sorted, shredded and micronised to produce a recycled vinyl feedstock, which was blended at levels ranging from 10% to 100% with virgin material. Two rounds of production trials included manual and automated pressing. Eco-mix vinyl – a homogeneous, post-industrial, 100%-recycled compound – was included as a comparison.
'The primary challenge observed was managing variability associated with a heterogeneous feedstock originating from multiple manufacturing sources rather than a single, controlled compound stream,' Víšek notes.
Maintaining material consistency and process control were key at the different recycled content rates. Higher recycled-content blends generally required greater operator oversight and introduced more variability. Importantly, the pilot did not identify any degradation effects that prevent production of commercial-grade pressings.
Performance was assessed through manufacturing observations, blind listening assessments at the infamous Abbey Road Studios and a Life Cycle Assessment (LCA).
The latter compared the recovered material scenario with a virgin material baseline. The 25% recycled blend reportedly achieved the highest overall scores, while the 100% recycled variant scored lowest. 'Across the listening panel, blends incorporating mixed-origin recycled feedstock produced no consistently detectable differences in sound quality,' notes Madeleine Smith, Senior Director of ESG at Warner Music Group.
'The three highest-rated variants fell within a narrow range of roughly 0.2 points on a 10-point scale, and all assessed variants ranged only 0.5 points between the best and the worst, suggesting that recycled blends can perform comparably to virgin vinyl pressings.
'Overall, the listening panel did not identify evidence suggesting that recycled mixed-origin feedstock inherently compromises perceived audio quality under the conditions of this pilot.'
The LCA demonstrates a 10.6% emissions reduction compared with the virgin material baseline, although Smith caveats that the results 'should be interpreted within the defined system boundary and pilot conditions, and are not intended to represent all vinyl manufacturing systems'.
Smith adds that several barriers remain to be overcome, including 'establishing efficient collection, sorting and logistics systems' and developing 'appropriate accounting and certification frameworks'. Broader adoption will require further validation across facilities, equipment platforms and feedstock types.
Further work is also needed to assess post-consumer recovery pathways, which present challenges including contamination, unknown material composition, legacy additive systems and limitations in material traceability, as well as coloured vinyl formulations, picture discs and the effects of repeated recycling cycles on material performance and audio quality.
Smith notes that scaleability will depend on technical capability and infrastructure development, but also on 'building the systems, partnerships and industry confidence needed to support circular material flows throughout the vinyl value chain'.
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