Tango.info performance date source

Overview

This page gives some details about tango.info performance date sources.

Sources that contradict each other

For each performance date having a single source, or having only agreeing sources, the date given in this source, or these sources, has been used. For contradicting sources one given date has been picked.

Trustworthiness

Since there are sources that contradict each other, at least some are wrong.

The most trustworthy are probably the dates given in the graphics linked from The Argentine Talking Machine Works - Buenos Aires, since they might be the closest to the event of performing.

The trustworthiness of other sources is hard to estimate, since most don't give their sources, or give a source that doesn't give its source, e.g. one discography referencing another discography.

Examples

• Photographs or scans of paper where recording/performance dates had been written down by the record company, e.g. The Argentine Talking Machine Works - Buenos Aires
• 78 rpm labels contain the year, e.g. T.K. from 1955: https://tango.info/?q=s-54
• Performers emailed dates of their own performances, e.g. Quinteto Angel, Ensemble Hyperion
• CD covers
  • CD issued by record company or under their label (e.g. some Reliquias CDs marked as EMI, contain dates for Odeon recordings - Odeon is owned by EMI)
  • CD issued by third party, made from 78 rpm transfers, e.g. Euro Records/BATC, CTA
• Discographies (e.g. todotango.com discographies, Juan D Arienzo discography by Johan, Francisco Canaro discography by Christoph Lanner, Encyclopedic Discography of Victor Recordings)
• LP cover containing a track date

Release dates

http://simbatango.com/2011/04/05/tango-recordings-through-the-year/#comment-1233

Chris, UK, 2011-04-06
I wonder if many tango.info dates are actually release dates 
rather than recording dates, and hence the summer dip actually 
corresponds to seasonal variation in consumer demand.